Hayward H100ID pool heater not working

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  #1  
Old 06-10-12, 01:16 PM
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Hayward H100ID pool heater not working

The heater is 5 years old. I bought a new ignitor and have spark. I cleaned out the gas orifices and heat tubes. The blower works and blows exhaust. There is strong water flow through the heater. I only get the gas valve to open if I jump out the control circuit and bring 24 volts directly to the valve. Then there is a strong gas smell. I tried jumping out one control at a time but the valve won"t open. I don't have a multimeter. Anything else I can do? Thanks.
 
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  #2  
Old 06-10-12, 03:46 PM
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check vac switch on blower, might need to invest in a cheap voltmeter in order to test valve properly.
 
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Old 06-10-12, 08:20 PM
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Thank you for the reply! That is the one switch I didn't jump out. Because the blower is working I thought it was ok. How would you test that switch? I have a continuity tester. an AC voltmeter, and an amprobe.
 
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Old 06-10-12, 09:12 PM
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would need to test with blower running, it is a closed switch. Look for voltage running through when fan is running
 
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Old 06-11-12, 02:14 PM
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Okay Todrut. There are three wires on the blower switch: a blue (from the control loop) a black and a red (both go to blower)
When the blower is running the blue has 120 volts to ground, the red has 120 volts to ground and the black has 60 volts to ground. Does that tell us anything?
 
  #6  
Old 06-11-12, 05:14 PM
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you are actually testing the temp switch for blower speeds. The air pressure swith will have red wire going in and red wire coming out, sorry can't remember which to test but ok, test both and make sure you get 110 when fan is on during ignition cycle.
 
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Old 06-11-12, 07:14 PM
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Oops. I'll get back in there tomorrow. Thanks for your patience.
 
  #8  
Old 06-12-12, 09:25 AM
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I tested the air pressure switch with the blower running, 120 volts in and out. I also tested all the controls, 120 volts in and out. I took off the printed circuit board and visually checked all the components and solder. Everything looked good. It just seems that the controller won't open the gas valve. Anything else I can do? Thanks.
 
  #9  
Old 06-12-12, 09:33 AM
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yes, test the gas valve to make sure there is voltage there to open valve. Again, make sure to test through the cycle so when it is time to open you'll se voltage or not. If there is voltage and not opening, bad valve. If no voltage and you tested everything else correctly bad board. Just a not, you are keeping the door button pressed in or jumped right?
 
  #10  
Old 06-12-12, 03:05 PM
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Yes I am working from the top with the door in place. I got rained out for now but I think there is no voltage getting to the valve because when I jumped the violet and the red (that brought voltage directly to the valve) and it opened with strong gas flow. I thought the board was ok because I got spark but I wasn't considering that it also is the last link to bring voltage to the valve.
Thank you for the help! I'll follow up if a new board fixes it.
 
  #11  
Old 06-15-12, 11:42 AM
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So, I bought a new controller board and installed it and the gas valve opened and I had ignition!!! But it only stays lit for about 10 seconds and the gas valve shuts. The blower stays on but it doesn't try to start again. no clicking of the ignitor. If I turn it off and try again the same thing happens. Help, my pool is freezing.
 
  #12  
Old 06-15-12, 12:13 PM
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Has to be getting too hot or not hot enough.

is blower jumping to high speed? Does vent air feel too hot? And is it blowing air good?
 
  #13  
Old 06-15-12, 12:26 PM
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The blower is blowing very good. When the gas ignites the exhaust feels very hot for the ten seconds it is on.
 
  #14  
Old 06-15-12, 12:47 PM
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but do you notice it switching to high? Should do it just after gets warm.
 
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Old 06-15-12, 01:02 PM
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I don't. It seems to be at one speed.
 
  #16  
Old 06-15-12, 04:44 PM
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sounds like the temp switch, it is the one you tested before the vac switch. I would test it, red is high, blk is low. What seems to be doing is opening the high limit cause fan is not switching to high.
 
  #17  
Old 06-16-12, 02:51 AM
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When the blower is running the blue has 120 volts to ground, the red has 120 volts to ground and the black has 60 volts to ground.


 
  #18  
Old 06-16-12, 12:25 PM
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the black never gives 120? sounds like bad switch.
 
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