Pentair Air Blower Kit Natural Gas Units (Models 400NA) | MasterTemp | 77707-0253
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- SKU:
- 77707-0253
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About This Item
OEM Blower Kit for the MasterTemp 400NA Natural Gas Heater
The Pentair Air Blower Kit (77707-0253) is the OEM replacement blower assembly for the MasterTemp 400NA natural gas heater. This kit is specific to the 400NA natural gas configuration — confirm your heater's model designation before ordering.
⚠️ IMPORTANT: HEATER COMPONENT — 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.
⚠️ IMPORTANT: KIT LISTING — NATURAL GAS ONLY
This listing is a kit, not a single blower component. It is designed for natural gas (NA) 400 BTU models only. A separate blower kit applies to propane (LP) variants — confirm your fuel type before ordering.
What It Does
The blower assembly draws combustion air through the heat exchanger on induced-draft gas heaters. On the MasterTemp 400NA platform, a failed or degraded blower prevents the pressure switch from closing, which blocks ignition — resulting in a heater that powers on but will not fire. This kit is the self-contained replacement for the original blower assembly on the 400NA model.
Specifications
| Pentair Part Number | 77707-0253 |
| Part Name | Air Blower Kit — Natural Gas Units (Models 400NA) |
| Fuel Type | Natural Gas (NA) only |
| Quantity Included | Kit (1 per heater) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | MasterTemp | 400NA | Air Blower Kit for Natural Gas 400NA Model only |
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, locate the full model number and serial number on the data plate affixed to your heater cabinet. The 400NA designation is critical — the natural gas and propane blower kits are not interchangeable. Cross-reference part number 77707-0253 directly against the exploded diagram in your heater's installation manual to confirm this kit is correct for your specific production run. If the data plate lists a different blower part number, contact Pentair technical support before purchasing.
