Hi,
I have a Hayward H250 Millivolt heater that is around 9 years old. I can get the pilot to light and stay lit with a nice blue flame and it is generating around 600 mV. When I turn the heater on and turn the thermostat up, the heater won't fire. If I jump across the TH terminals the heater will fire up and run.
I have taken the pilot assembly out, cleaned the orifices, and blown the lines, with no change in voltage output or behaviour. If I heat the thermopile with a torch it will go up to around 650 mV before going OL.
What should the voltage from the pilot/thermopile be to open the gas valve and run the heater?
Thanks!
I have a Hayward H250 Millivolt heater that is around 9 years old. I can get the pilot to light and stay lit with a nice blue flame and it is generating around 600 mV. When I turn the heater on and turn the thermostat up, the heater won't fire. If I jump across the TH terminals the heater will fire up and run.
I have taken the pilot assembly out, cleaned the orifices, and blown the lines, with no change in voltage output or behaviour. If I heat the thermopile with a torch it will go up to around 650 mV before going OL.
What should the voltage from the pilot/thermopile be to open the gas valve and run the heater?
Thanks!