Pentair Air Blower Kit – Natural Gas for MasterTemp 125 Heater | 474978
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- SKU:
- 474978
-
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About This Item
The Pentair Air Blower Kit – Natural Gas (474978) is the OEM replacement blower assembly for the MasterTemp 125 Natural Gas heater, restoring proper combustion airflow to the burner system.
⚠️ IMPORTANT: KIT LISTING
This listing is a complete Air Blower Kit — not a single component. All kit contents are included as supplied by Pentair for this repair.
⚠️ IMPORTANT: LICENSED TECHNICIAN REQUIRED
Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.
The air blower supplies the forced combustion air required for the MasterTemp 125's burner to ignite and sustain a clean, efficient flame. When the blower fails — through motor wear, bearing failure, or electrical fault — the heater will not fire or will shut down on a pressure or airflow fault. Replacing the blower kit with the correct OEM assembly restores the designed airflow rate and ensures the heater's safety interlock circuit operates as intended. Confirm this is the Natural Gas version of the MasterTemp 125 before ordering — a separate blower kit applies to the LP (propane) configuration.
Specifications
| Pentair Part Number | 474978 |
| Part Name | Air Blower Kit – Natural Gas |
| Fuel Type | Natural Gas (NG) |
| Quantity Included | Kit (1 complete assembly) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | MasterTemp 125 Heater — MasterTemp Series | MT125 | Air Blower Kit for Natural Gas |
| Pentair | MasterTemp 125 Heater — MasterTemp Series | MasterTemp125 | Air Blower Kit for Natural Gas |
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.
Pro Tip
Before ordering, confirm your MasterTemp 125 is configured for Natural Gas — not LP. The fuel type is printed on the heater's rating label, typically located on the inside of the front access panel. Installing the wrong blower kit for the fuel configuration can prevent proper ignition. If your heater is displaying an airflow or pressure switch fault code, have a licensed technician verify the blower is the root cause before replacing — a blocked flue or failed pressure switch can produce identical fault codes.
