Quote:
Originally Posted by cabmando
If you have a V.O.M, check to see how many millivolts the thermopile is producing. It looks like the thermopile should be producing a minimum of 300 millivolts from what I've found.
Also, have you tried putting a jumper in place to bypass the thermostat? And looking at the pilot flame, is there good coverage of the thermopile?
|
This. If voltage is good and it fires consistently with a jumper, suspect the thermostat. You can also take one thermostat lead off, make sure thermo is closed, and check voltage across it. Sometimes if the voltage is marginal tapping can release the solenoid.
If that checks out, suspect regulator or pressure. Also, some Robertshaw control units have internal regulators- make sure its set up for lp if that's what your using, or blank it off if using a low pressure regulator ahead of the unit. They sell a blanking plate for that.
Went thru all of this with a greenhouse heater recently,.