{"product_id":"hayward-hpx51100122201-heatpro-summit-heat-pump-control-board-retrofit-kit","title":"Hayward HPX51100122201 HeatPro and Summit Heat Pump Control Board Retrofit Kit","description":"\n\u003cstyle\u003e\n  .hpxbrd-wrap, .hpxbrd-wrap * { box-sizing: border-box; }\n  .hpxbrd-wrap {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: #1a1a1a;\n    line-height: 1.6;\n  }\n\n  \/* Hero *\/\n  .hpxbrd-hero {\n    background: linear-gradient(135deg, #b22222 0%, #f57c2b 100%);\n    color: #fff;\n    padding: 60px 40px;\n    border-radius: 16px;\n    text-align: center;\n    margin-bottom: 40px;\n  }\n  .hpxbrd-hero h1 { font-size: 2.8em; margin: 0 0 12px; font-weight: 800; letter-spacing: -0.02em; }\n  .hpxbrd-tagline { font-size: 1.25em; opacity: 0.95; margin: 0 0 28px; }\n  .hpxbrd-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }\n  .hpxbrd-badge {\n    background: rgba(255,255,255,0.18);\n    backdrop-filter: blur(10px);\n    -webkit-backdrop-filter: blur(10px);\n    border: 1px solid rgba(255,255,255,0.3);\n    color: #fff;\n    padding: 10px 20px;\n    border-radius: 50px;\n    font-size: 0.95em;\n    font-weight: 600;\n  }\n\n  \/* Intro *\/\n  .hpxbrd-intro {\n    max-width: 850px;\n    margin: 0 auto 40px;\n    text-align: center;\n    font-size: 1.1em;\n    color: #333;\n  }\n\n  \/* Stat strip *\/\n  .hpxbrd-stats {\n    background: linear-gradient(135deg, #5a0f0f 0%, #b22222 100%);\n    color: #fff;\n    border-radius: 16px;\n    padding: 32px;\n    display: grid;\n    grid-template-columns: repeat(5, 1fr);\n    gap: 16px;\n    margin-bottom: 48px;\n  }\n  .hpxbrd-stat { text-align: center; 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color: #b22222; }\n  .hpxbrd-spec-val { color: #1a1a1a; text-align: right; }\n\n  \/* FAQ *\/\n  .hpxbrd-faq-card {\n    background: #fff;\n    border: 1px solid #e1e6ed;\n    border-radius: 12px;\n    padding: 24px 28px;\n    margin-bottom: 16px;\n  }\n  .hpxbrd-faq-card h4 { margin: 0 0 8px; color: #b22222; font-size: 1.1em; }\n  .hpxbrd-faq-card p { margin: 0; color: #333; }\n\n  \/* CTA *\/\n  .hpxbrd-cta {\n    background: linear-gradient(135deg, #b22222 0%, #f57c2b 100%);\n    color: #fff;\n    border-radius: 16px;\n    padding: 50px 40px;\n    text-align: center;\n  }\n  .hpxbrd-cta h2 { font-size: 2em; margin: 0 0 12px; }\n  .hpxbrd-cta p { margin: 0 0 24px; font-size: 1.1em; opacity: 0.95; }\n  .hpxbrd-perks { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }\n  .hpxbrd-perk {\n    background: rgba(255,255,255,0.18);\n    backdrop-filter: blur(10px);\n    -webkit-backdrop-filter: blur(10px);\n    border: 1px solid rgba(255,255,255,0.3);\n    padding: 10px 20px;\n    border-radius: 50px;\n    font-size: 0.95em;\n    font-weight: 600;\n  }\n\n  \/* Responsive *\/\n  @media (max-width: 700px) {\n    .hpxbrd-hero h1 { font-size: 2em; }\n    .hpxbrd-stats { grid-template-columns: repeat(2, 1fr); }\n    .hpxbrd-feature { grid-template-columns: 1fr; }\n    .hpxbrd-feature.hpxbrd-reverse .hpxbrd-feature-visual { order: 0; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"hpxbrd-wrap\"\u003e\n\n  \u003csection class=\"hpxbrd-hero\"\u003e\n    \u003ch1\u003eHayward HPX51100122201 HeatPro and Summit Heat Pump Control Board Retrofit Kit\u003c\/h1\u003e\n    \u003cp class=\"hpxbrd-tagline\"\u003eBring the brain of your heat pump back.\u003c\/p\u003e\n    \u003cdiv class=\"hpxbrd-badges\"\u003e\n      \u003cspan class=\"hpxbrd-badge\"\u003eAuthorized Hayward Dealer\u003c\/span\u003e\u003cspan class=\"hpxbrd-badge\"\u003eFree Shipping\u003c\/span\u003e\u003cspan class=\"hpxbrd-badge\"\u003eGenuine OEM Board\u003c\/span\u003e\u003cspan class=\"hpxbrd-badge\"\u003eReplaces SMX306000016\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003cp class=\"hpxbrd-intro\"\u003eThe \u003cstrong\u003eHayward HPX51100122201 Heat Pump Control Board Retrofit Kit (PST-HPX51100122201)\u003c\/strong\u003e is the genuine Hayward OEM replacement brain for HeatPro, Summit, HeatMaster, EnergyTherm, and EasyTemp pool heat pumps. You get the updated electronic control board assembly that supersedes the legacy \u003cstrong\u003eSMX306000016\u003c\/strong\u003e, with the same plug-in connector layout your installed harness already uses. Drop it in, restore the temperature setpoint, fault codes, and compressor staging, and skip the cost of replacing the entire heat pump cabinet.\u003c\/p\u003e\n\n  \u003csection class=\"hpxbrd-stats\"\u003e\n    \u003cdiv class=\"hpxbrd-stat\"\u003e\n\u003cdiv class=\"hpxbrd-stat-value\"\u003eOEM\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat-label\"\u003eGenuine Hayward\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat\"\u003e\n\u003cdiv class=\"hpxbrd-stat-value\"\u003e5 lbs\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat-label\"\u003eShipping Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat\"\u003e\n\u003cdiv class=\"hpxbrd-stat-value\"\u003e1 Year\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat-label\"\u003eHayward Warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat\"\u003e\n\u003cdiv class=\"hpxbrd-stat-value\"\u003e10+\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat-label\"\u003eCompatible Models\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat\"\u003e\n\u003cdiv class=\"hpxbrd-stat-value\"\u003ePlug-In\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-stat-label\"\u003eConnector Retrofit\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \n  \u003csection class=\"hpxbrd-feature\"\u003e\n    \u003cdiv class=\"hpxbrd-visual hpxbrd-feature-visual\"\u003e\n      \u003cspan class=\"hpxbrd-visual-icon\"\u003e⚙️\u003c\/span\u003e\n      \u003cspan class=\"hpxbrd-visual-label\"\u003eOEM Logic Board\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003ch3\u003eRestores \u003cspan class=\"hpxbrd-accent\"\u003eSmart Control\u003c\/span\u003e  to Your Heat Pump\u003c\/h3\u003e\n      \u003cp\u003eWhen the original board faults, the heat pump stops staging, stops reading the water temperature sensor, or throws a blank display. The \u003cstrong\u003eHPX51100122201\u003c\/strong\u003e drops in as a direct OEM replacement and brings back setpoint control, defrost cycling, high and low pressure protection, and the fault-code readout. You skip a several-thousand-dollar full-cabinet swap and put the existing compressor, fan, and titanium heat exchanger back to work for the rest of the season.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n  \n  \u003csection class=\"hpxbrd-feature hpxbrd-reverse\"\u003e\n    \u003cdiv class=\"hpxbrd-visual hpxbrd-visual-light hpxbrd-feature-visual\"\u003e\n      \u003cspan class=\"hpxbrd-visual-icon\"\u003e🔧\u003c\/span\u003e\n      \u003cspan class=\"hpxbrd-visual-label\"\u003eDirect Retrofit\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003ch3\u003eReplaces the \u003cspan class=\"hpxbrd-accent\"\u003eLegacy\u003c\/span\u003e  SMX306000016\u003c\/h3\u003e\n      \u003cp\u003eHayward consolidated the older \u003cstrong\u003eSMX306000016\u003c\/strong\u003e board into the updated HPX51100122201 retrofit kit, which uses the same harness connectors your installed unit already has. The pin-outs for the high-pressure switch, low-pressure switch, water temperature sensor, ambient sensor, defrost sensor, and contactor coil land on the same headers, so a qualified service tech can swap the board without re-pinning the harness or rebuilding the low-voltage tree.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n  \n  \u003csection class=\"hpxbrd-feature\"\u003e\n    \u003cdiv class=\"hpxbrd-visual hpxbrd-visual-dark hpxbrd-feature-visual\"\u003e\n      \u003cspan class=\"hpxbrd-visual-icon\"\u003e🌡️\u003c\/span\u003e\n      \u003cspan class=\"hpxbrd-visual-label\"\u003eWide Compatibility\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003ch3\u003eFits Hayward \u003cspan class=\"hpxbrd-accent\"\u003eHeatPro\u003c\/span\u003e  and Summit Lines\u003c\/h3\u003e\n      \u003cp\u003eOne board covers the residential Hayward heat pump catalog from the Summit and HeatPro families through HeatMaster, EnergyTherm, and EasyTemp. That includes \u003cstrong\u003eHP21004T, HP21124T, HP21254T, and HP21404T\u003c\/strong\u003e HeatPro units, the SUM-series Summit heat pumps, and the larger HP31154T and HP31204T variants. Verify your unit's model and serial label, and confirm the legacy board number against SMX306000016 before ordering.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n  \n\n  \u003csection class=\"hpxbrd-section\"\u003e\n    \u003ch2\u003eWho It's For\u003c\/h2\u003e\n    \u003cdiv class=\"hpxbrd-app-grid\"\u003e\n      \u003cdiv class=\"hpxbrd-app-card\"\u003e\n\u003ch4\u003eHeatPro Heat Pumps\u003c\/h4\u003e\n\u003cp\u003eDirect replacement on HP21004T, HP21124T, HP21254T, and HP21404T HeatPro residential pool heat pumps when the original board faults or displays go dark.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-app-card\"\u003e\n\u003ch4\u003eSummit Heat Pumps\u003c\/h4\u003e\n\u003cp\u003eBrings the SUM5, SUMXL112, SUMXL140, and other Summit-series units back to full setpoint and defrost control without replacing the entire cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-app-card\"\u003e\n\u003ch4\u003eHeatMaster and EnergyTherm\u003c\/h4\u003e\n\u003cp\u003eCarries forward into HeatMaster, EnergyTherm, and EasyTemp residential heat pumps that share the legacy SMX306000016 board footprint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-app-card\"\u003e\n\u003ch4\u003eEnd-of-Season Repairs\u003c\/h4\u003e\n\u003cp\u003eCommon spring-startup fix when the heat pump powers on but will not stage the compressor, will not read water temperature, or trips a board-side fault code.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"hpxbrd-section\"\u003e\n    \u003ch2\u003eWhy PST Customers Pick This\u003c\/h2\u003e\n    \u003cdiv class=\"hpxbrd-feature-grid\"\u003e\n      \u003cdiv class=\"hpxbrd-feature-card\"\u003e\n\u003cdiv class=\"hpxbrd-emoji\"\u003e⚙️\u003c\/div\u003e\n\u003ch5\u003eGenuine Hayward OEM\u003c\/h5\u003e\n\u003cp\u003eBuilt and packaged by Hayward, not a third-party clone. Maintains your unit's eligibility for any remaining manufacturer service support.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-feature-card\"\u003e\n\u003cdiv class=\"hpxbrd-emoji\"\u003e🔧\u003c\/div\u003e\n\u003ch5\u003ePlug-In Connector Retrofit\u003c\/h5\u003e\n\u003cp\u003eDrops onto the existing harness headers used by the SMX306000016, so the swap is a board exchange, not a harness rebuild.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-feature-card\"\u003e\n\u003cdiv class=\"hpxbrd-emoji\"\u003e🌡️\u003c\/div\u003e\n\u003ch5\u003eFull Sensor Support\u003c\/h5\u003e\n\u003cp\u003eReads the water, ambient, and defrost temperature sensors and drives compressor staging and defrost cycling per Hayward's logic.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-feature-card\"\u003e\n\u003cdiv class=\"hpxbrd-emoji\"\u003e🛡️\u003c\/div\u003e\n\u003ch5\u003eHigh and Low Pressure Protection\u003c\/h5\u003e\n\u003cp\u003eHonors the refrigerant high-pressure and low-pressure switches so the compressor faults out cleanly instead of running into damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-feature-card\"\u003e\n\u003cdiv class=\"hpxbrd-emoji\"\u003e🎯\u003c\/div\u003e\n\u003ch5\u003eCovers Multiple Heat Pump Families\u003c\/h5\u003e\n\u003cp\u003eOne part number serves the HeatPro, Summit, HeatMaster, EnergyTherm, and EasyTemp lines, simplifying the parts shelf for service pros.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-feature-card\"\u003e\n\u003cdiv class=\"hpxbrd-emoji\"\u003e📈\u003c\/div\u003e\n\u003ch5\u003eRestores Fault Code Diagnostics\u003c\/h5\u003e\n\u003cp\u003eReturns the on-board fault display so the next service call diagnoses the unit in minutes instead of chasing voltages with a meter.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \n  \u003cdiv class=\"hpxbrd-warning\"\u003e\n    \u003ch4\u003eInstallation Notice\u003c\/h4\u003e\n    \u003cp\u003eThe HPX51100122201 is a line-voltage and low-voltage control board inside a pool heat pump. Disconnect power at the breaker before opening the cabinet and verify zero voltage at the contactor load side. Installation must be performed by a qualified HVAC or pool heat pump technician, and all bonding, grounding, and disconnect work must comply with \u003cstrong\u003eNEC 680\u003c\/strong\u003e. Improper installation, miswired sensor leads, or reversed line voltage will damage the board and void Hayward's warranty.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \n\n  \u003csection class=\"hpxbrd-section\"\u003e\n    \u003ch2\u003eFull Specifications\u003c\/h2\u003e\n    \u003cdiv class=\"hpxbrd-spec-grid\"\u003e\n      \u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eManufacturer\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eHayward\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eModel\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eHeat Pump Control Board Retrofit Kit\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eMPN\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eHPX51100122201\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eHayward Description\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eKit, Board-Control, HO (Open Line)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eSKU\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003ePST-HPX51100122201\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eUPC\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003e610377444255\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eReplaces\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eSMX306000016\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eProduct Type\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eHeat Pump Electronic Control Board\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eCompatible Heat Pump Lines\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eHeatPro, Summit, HeatMaster, EnergyTherm, EasyTemp\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eCompatible HeatPro Models\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eHP21004T, HP21124T, HP21254T, HP21404T\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eCompatible Summit Models\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eSUM5, SUMXL112, SUMXL140, HP31154T, HP31204T\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eApplication\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eResidential pool heat pump retrofit and service replacement\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eFunctions Controlled\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eSetpoint, compressor staging, defrost cycling, high and low pressure protection, sensor inputs\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eConnector Style\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eOEM plug-in headers, matches existing SMX306000016 harness\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eShipping Weight\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003e5 lbs\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eChannel\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003eOpen Line\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hpxbrd-spec-row\"\u003e\n\u003cspan class=\"hpxbrd-spec-key\"\u003eWarranty\u003c\/span\u003e\u003cspan class=\"hpxbrd-spec-val\"\u003e1-Year Hayward Parts Only Limited Warranty\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"hpxbrd-section\"\u003e\n    \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n    \n    \u003cdiv class=\"hpxbrd-faq-card\"\u003e\n      \u003ch4\u003eDoes the HPX51100122201 actually replace the SMX306000016?\u003c\/h4\u003e\n      \u003cp\u003eYes. Hayward superseded the older \u003cstrong\u003eSMX306000016\u003c\/strong\u003e with the \u003cstrong\u003eHPX51100122201\u003c\/strong\u003e retrofit kit, and the new board uses the same harness connectors. If your old board is stamped SMX306000016 and the heat pump model is on the compatibility list, the HPX51100122201 is the correct replacement.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \n    \u003cdiv class=\"hpxbrd-faq-card\"\u003e\n      \u003ch4\u003eWhich Hayward heat pump models is this control board compatible with?\u003c\/h4\u003e\n      \u003cp\u003eThe HPX51100122201 covers the HeatPro models \u003cstrong\u003eHP21004T, HP21124T, HP21254T, and HP21404T\u003c\/strong\u003e, the Summit series including \u003cstrong\u003eSUM5, SUMXL112, SUMXL140, HP31154T, and HP31204T\u003c\/strong\u003e, and the related HeatMaster, EnergyTherm, and EasyTemp residential heat pumps. Always cross-check the legacy board number on the old board and your unit's model and serial label before ordering.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \n    \u003cdiv class=\"hpxbrd-faq-card\"\u003e\n      \u003ch4\u003eHow do I know the board is the actual problem and not the sensor or contactor?\u003c\/h4\u003e\n      \u003cp\u003eCommon symptoms that point to the board are a \u003cstrong\u003eblank or frozen display\u003c\/strong\u003e, a unit that powers on but never calls the compressor contactor, missing temperature reads from a known-good sensor, or repeating fault codes that clear when the board is reset but return immediately. Replace the board only after a service tech has confirmed line voltage at the input, verified the sensors with a meter, and ruled out the contactor coil. Hayward will not warranty a board damaged by an unaddressed sensor or wiring fault.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \n    \u003cdiv class=\"hpxbrd-faq-card\"\u003e\n      \u003ch4\u003eWhat is the difference between this kit and a generic aftermarket board?\u003c\/h4\u003e\n      \u003cp\u003eThe HPX51100122201 is a \u003cstrong\u003egenuine Hayward OEM\u003c\/strong\u003e board produced for retrofit service. Aftermarket clones may map the connectors differently, may not honor the high and low pressure switch logic, and will not be covered by Hayward's warranty if they damage the compressor. PST sells only the OEM Hayward kit.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \n    \u003cdiv class=\"hpxbrd-faq-card\"\u003e\n      \u003ch4\u003eCan I install this myself?\u003c\/h4\u003e\n      \u003cp\u003eNo. The board sits inside a high-voltage cabinet next to a single-phase or three-phase contactor and a sealed refrigerant system. Replacement must be performed by a qualified pool heat pump or HVAC service technician, with power disconnected at the breaker and verified at the load side. Wiring, bonding, and grounding must comply with \u003cstrong\u003eNEC 680\u003c\/strong\u003e. PST does not warranty boards damaged by owner installation or by miswired sensor or contactor leads.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \n    \u003cdiv class=\"hpxbrd-faq-card\"\u003e\n      \u003ch4\u003eDoes it come with the sensors, harness, or display ribbon?\u003c\/h4\u003e\n      \u003cp\u003eThe HPX51100122201 retrofit kit is the \u003cstrong\u003eelectronic control board assembly\u003c\/strong\u003e. Reuse your existing temperature sensors, pressure switches, harness, and display ribbon if they test good. If a sensor or pressure switch is the root cause of the original board failure, order the corresponding Hayward service part and replace it at the same time.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \n    \u003cdiv class=\"hpxbrd-faq-card\"\u003e\n      \u003ch4\u003eWhat warranty does PST offer on this Hayward control board?\u003c\/h4\u003e\n      \u003cp\u003eHayward backs the HPX51100122201 with a \u003cstrong\u003e1-year parts-only limited warranty\u003c\/strong\u003e from the date of purchase, registered through PST Pool Supplies as an authorized Hayward dealer. Damage from miswired sensors, line-voltage faults, or owner installation is not covered.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \n  \u003c\/section\u003e\n\n  \u003csection class=\"hpxbrd-cta\"\u003e\n    \u003ch2\u003eOrder the Hayward HPX51100122201 From PST\u003c\/h2\u003e\n    \u003cp\u003eAuthorized Hayward dealer. PST ships the genuine OEM HPX51100122201 retrofit control board with full Hayward manufacturer warranty registered through PST Pool Supplies.\u003c\/p\u003e\n    \u003cdiv class=\"hpxbrd-perks\"\u003e\n      \u003cspan class=\"hpxbrd-perk\"\u003eFree Shipping\u003c\/span\u003e\u003cspan class=\"hpxbrd-perk\"\u003e30-Day Returns\u003c\/span\u003e\u003cspan class=\"hpxbrd-perk\"\u003e1-Year Hayward Warranty\u003c\/span\u003e\u003cspan class=\"hpxbrd-perk\"\u003eAuthorized Hayward Dealer\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n\u003c\/div\u003e\n","brand":"Hayward","offers":[{"title":"Default Title","offer_id":44002162278465,"sku":"PST-HPX51100122201","price":381.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/1623\/0209\/files\/PST-HPX51100122201.jpg?v=1780385370","url":"https:\/\/www.pstpoolsupplies.com\/products\/hayward-hpx51100122201-heatpro-summit-heat-pump-control-board-retrofit-kit","provider":"PST Pool Supplies","version":"1.0","type":"link"}