Best Swimming Pool Heater Parts Under $100 (2026)
We scored parts for under-(price varies) value based on compatibility with Pentair/Sta‑Rite heaters, user ratings, build quality, and relevance to common heater failures
This roundup covers quality replacement parts and controls for residential swimming pool heaters priced under $100, focused on compatibility with Pentair and Sta-Rite systems. Selections favor well-reviewed components that address common failure points—safety cutoffs, thermal regulators, membrane pads, and pressure switches—so you can target repairs without replacing the whole heater
Top Picks
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1
High Limit Switch for Pentair Mastertemp & Sta Rite Heaters
Replacement high limit switch for Pentair Mastertemp and Sta Rite heaters. Indicates when HLS LED is illuminated to prompt replacement. Customer note: easy to install and fits Pentair 400 series and other BTU units
- compatible with Pentair Mastertemp and Sta Rite
- HLS indicator signals replacement
- measures high temperature limit (135F)
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2
Thermal regulator for Pentair Mastertemp & Sta-Rite heaters
Thermal regulator compatible with Pentair Mastertemp and Sta-Rite low NOx pool heaters. Offers straightforward installation and reliable fit, per user feedback. One customer note highlights durability concerns
- compatible with multiple heater models
- simple installation
- robust compatibility with Mastertemp/Sta-Rite parts
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3
Membrane Pad Replacement for Pentair Mastertemp & Starite Heater
Replacement membrane pad for Pentair Mastertemp 400 control board compatible heaters. Designed for easy plug-in installation and reliable operation. Customer note: easy to install with a good fit and solid construction
- plug-in replacement for Mastertemp control pad
- fits multiple Pentair models
- easy to install
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4
Swimables Thermal Regulator Kit for Pentair Mastertemp & Sta-Rite
Thermal regulator kit for Pentair Mastertemp and Sta-Rite pool heaters. Provides regulator functionality and compatibility with multiple Mastertemp models. Customers report easy installation and a good fit, with some noting durability concerns
- compatible with multiple Mastertemp models
- clear testing guidance for regulator
- well-fitting replacement part
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5
Swimables Water Pressure Switch for Pentair MasterTemp
Pressure switch compatible with Pentair Mastertemp heater parts; engages safety if water flow is interrupted. Customers note easy installation and good fit, with mixed durability reviews
- compatibility with all Mastertemp parts
- easy installation steps
- safety function to stop burner if flow interrupted
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6
Pool Heater Control Board Kit 461105 replacement
Includes 42002-0007S control board and 472610Z film pad for Pentair Mastertemp/Max-E-Therm heaters. Ensures coordinated operation and protection with durable insulation and moisture resistance
- includes board and film pad
- durable moisture-resistant coating
- precise signal processing modules
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7
Air Flow Switch for Pentair/Sta Rite pool heater parts
Air Flow Switch compatible with Pentair Mastertemp and Sta Rite heaters; helps address AFS errors. Customers note easy installation and good fit, with mixed durability reports
- AFS error replacement
- multi-model compatibility
- ease of installation
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8
Manifold Kit for Pentair Mastertemp with Unions & Bypass Valve
Manifold kit compatible with Pentair Mastertemp heaters, includes unions and bypass valve plus a heater drain plug. Customers report easy installation and a good fit, with mixed views on durability
- includes bypass valve
- comprehensive Mastertemp compatibility
- heater unions included
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9
Display Board Replacement for Hayward IDXL2DB1930
Replacement display board for Hayward heater/control panel. Offers easy installation and functional display, with mixed durability feedback from users
- easy installation
- compatible with multiple Hayward models
- affordable replacement part
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10
Optimum Pool Heater Repair Kit for Pentair MasterTemp & Max-E-Therm
Repair kit with thermistors, pressure and hi-limit switches, and gas shutoff. Enables replacements for specific Pentair models. Customers value ease of installation and value, though some report mixed performance and fit concerns
- comprehensive replacement kit
- easy installation
- compatibility with Pentair MasterTemp & Max-E-Therm