Looking for info on the gas valve on a Hayward pool heater h-200fdn. I can't get the heater to light and get a IF code. I'm pretty sure it's the gas valve. I tested the inlet onto the valve and got just over 7"wc. I then tested the outlet and was supposed to read 2"wc but the valve reads 0. I know the heater is shutting down because it can't light but if the valve was working wouldn't I get a quick spike on the gauge, even for a split second?
Hayward heater gas valve replacement testing with manometer
- Thread starter Standard28
- Start date
- Jul 21, 2013
- 64,689
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Inlet pressure stays the same....So I've never checked the voltage to the valve because I put a new board in and assumed the new board definitely had the correct voltage to the valve.
If the inlet pressure does not drop, the valve is not opening.
Check to see if it is getting the correct voltage.
Check to see if it is getting the correct voltage.
Are you familiar with the valve? I think it's s a 2 stage valve. The magnetic plunger opens the main gas line and the second valve opens the regulated pressure. The valves are controlled by coils that create magnets to engage or disengage the gas. I can def hear the click of the larger plunger opening and I know gas is present. My guess is the 2nd stage just isn't opening and isn't allowing and regulated gas through. I may be wrong though...
The transformer converts the field supply voltage (either 240 VAC or 120 VAC) to a 120 VAC output for blower and igniter power, and a 24 VAC output for powering the ignition control board, control circuits, and gas valve.
Here's what I've tried @JamesW
-removed flame sensor and lightly cleaned
-removed igniter and tested, fully glows
-removed manifold and cleaned orifices and blew out manifold
-inspected burner tubes and all clear
-replaced ignition board
-checked valve voltage and its 24V
-tested valve and hear clicking
-tested inlet gas on valve @7+"wc
-tested outlet gas on valve at 0 when engaged
What do you think? I really appreciate it!
-removed flame sensor and lightly cleaned
-removed igniter and tested, fully glows
-removed manifold and cleaned orifices and blew out manifold
-inspected burner tubes and all clear
-replaced ignition board
-checked valve voltage and its 24V
-tested valve and hear clicking
-tested inlet gas on valve @7+"wc
-tested outlet gas on valve at 0 when engaged
What do you think? I really appreciate it!
Seems like a bad gas valve.
How old is the heater?
Do you have pictures of everything?
How old is the heater?
Do you have pictures of everything?
Probably 8 years old....I have everything still disassembled and can take pics. Lmk what pics.
What date was it installed?
Can you show the label inside the heater with the serial number?