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Posted by RBM on June 15, 2006, 6:57 am
You may have a stuck main gas valve. Is the valve 24 volt or millivolt?
> My pool heater is acting up this year. Once the pilot is lit, it stays
> lit. The thermostat works, in that I can hear it click as it is
> rotated past a certain point, and my meter shows that it is opening and
> closing with the click. The vast majority of the time, rotating the
> thermostat to the point of calling for heat, does NOT fire the burner.
> If I jumper the TH terminals, and get the burner started, then the
> thermostat usually takes over and lets the burner cycle off and on.
> But if the thermostat quits firing the burner, I have to jumper it
> again. Since the thermostat is wired to the pressure safety switch, I
> was thinking that maybe the pressure safety switch was going bad, but
> that is just a guess. Before I start replacing parts, I thought I's
> post here.
>
> Can someone point me in the right direction? I'd appreciate any
> help/info.
>
> Tim
>
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