Hayward H-Series Above Ground 135K BTU Heater Replacement Parts

This Hayward H-Series Above Ground parts diagram covers the H-Series 135K BTU Propane Heater (W3HS135FDP), from the heat exchanger assembly and FD front header to the combustion blower kit, propane gas valve, ignitor control board, pressure switch and bezel and keypad assemblies. Click a numbered schematic key to open that part with its Hayward part number and current price.

Fits
Hayward H-Series 135K BTU Propane Heater W3HS135FDP · $2,720.99
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Frequently Asked Questions about Hayward H-Series Above Ground Parts

Answers on which heater this schematic covers, the part numbers it shows, and the components that fail most often.

Which heater does this Hayward H-Series Above Ground parts diagram cover?
It covers the Hayward H-Series 135K BTU Propane Heater, model W3HS135FDP. The parts keyed to the schematic are FD-series components such as the FDXLHXA1150 heat exchanger assembly, FDXLFHA1930 front header and FDXLGSV0002 propane gas valve.
How do I find the part number I need on the diagram?
Each component on the schematic has a numbered key. Clicking that key opens the matching Hayward part, so you can confirm the number stamped on the old piece against the listing before you add it to the cart.
What are common problems with Hayward pool heaters?
A heater that will not fire or that shuts down intermittently often traces to the water pressure switch, which has to see adequate flow before ignition is allowed; a dirty filter, clogged pump basket, closed valve or air in the system will trip it. Ignitors, flame sensors, blower vacuum switches and header O-rings are the other parts that wear or corrode on these units.
Do these parts fit the Hayward H100ID1 or H100IDP1 induced draft heater?
No. The older H-Series Above Ground induced draft heaters use a different parts family, including the CZXPRS1105 pressure switch, IDXGKT1930 heat exchanger gasket and IDXIGN1930 ignitor. Everything keyed to this diagram is FD-series, with FDXL and IDXL part numbers.
Which gaskets and seals are on this diagram?
The schematic keys include the FDXLFOR1930 header O-ring kit, FDXLGSK1934 combustion chamber front and air box gasket kit, FDXLGSK1933 return side tube sheet insulation, and the FDXLHDW1930 header hardware kit for reassembly.
Can I replace just the keypad instead of the whole control?
Yes. The bezel and keypad assembly kit is sold on its own, as FDXLBKP1930 for FD models and FDXLBKP1932 with the door included, separate from the FDXLICB1930 ignitor control board.
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