Lochinvar parts are contractor-channel — sold through Lochinvar-authorized distributors, not retail. Most parts require Lochinvar account access to source; some are available through HVAC supply houses (F.W. Webb, Ferguson HVAC, R.E. Michel).
Where to buy Lochinvar parts
- Lochinvar-authorized distributors — primary source; contractor account required
- HVAC supply houses — F.W. Webb, Ferguson HVAC, R.E. Michel, Granger
- Lochinvar tech support: 1-615-889-8900 — part lookup by serial number
- SupplyHouse.com / PEX Universe — some Lochinvar parts available online to homeowners
- OEM cross-references — circulators (Taco, Grundfos), thermistors (universal NTC) available retail
Common parts (linked pages)
- Igniter / electrode — silicon nitride hot surface or spark electrode
- Blower motor — variable-speed fan for combustion air
- Heat exchanger — stainless fire-tube primary heat exchanger
- Gas valve — modulating gas valve for combustion control
- Flame sensor — rectification sensor confirming flame presence
- Plate heat exchanger — combi DHW side stainless plate exchanger
- Circulator pump — internal (combi) or external (indirect loop) pump
Parts not user-serviceable
- Control board — model-specific firmware; replacement requires Lochinvar tech support setup
- Stainless tank (SSU) — sealed; replacement = new tank
- Glass-lined tank (SIT) — sealed; replacement = new tank if shell fails
- AWHP compressor — sealed refrigerant system; EPA-certified HVAC tech required
OEM cross-references
| Component | Common OEM | Aftermarket equivalent |
|---|---|---|
| Circulator (SQUIRE loop) | Taco 007 / Grundfos UPS 15-58 | Direct OEM swap |
| Aquastat (SQUIRE) | Honeywell L4081 | Honeywell L8124 |
| Combi gas valve | Honeywell or Sit-brand | OEM Lochinvar part only — tuned to platform |
| NTC sensors | 12kΩ Lochinvar-spec | Generic 12kΩ NTC after resistance verification |
| Hot surface igniter | Lochinvar OEM | Universal 80V/120V silicon nitride may fit some platforms |
Bottom line
Lochinvar parts run through contractors and distributors, not retail. For DIY-accessible parts (circulators, sensors, aquastats) cross-reference to widely-available OEMs. Heat-exchanger, gas-valve, and control-board replacements are contractor work and often warranty-covered when annual service is documented.