All was good then nothing. I have propane, good volts,no nests and removed the unit and cleaned the jet clean... the blower runs -no heat. The sail switch is working (checked it with continuity. The modle is a sububan sf-30. What else should i check and how?
Thanks B-fan
I know this sounds strange but had worked on several units with me. Just whack it. Yep hit the solenoid, with the back of a screw driver and it might just work.
I had a heater problem with a F/W ,the fix was to to remove wires and clean ends I don't know if it was corrosion or condensation, but it worked after cleaning.
Check the small time delay relay. It is black and about one inch cube. The thermostat calls for heat, the time delay relay starts the fan and in a set time, about 15-20 seconds, the time delay relay closes a set of contacts sending power via the sail switch and high heat cutout to the circuit board initiating ignitor.
Check for continuity on thermal cutout.
When you say you have propane, do you mean it’s flowing and your stove-top works? I had a problem where the furnace would run sometimes. Also if the furnace fails to light and maintain heat until it’s supposed to turn off, the circuit board will lock out the igniter, and you have to turn the thermostat off and back on to get it to start again.
My problem turned out to be water in the regulator fittings, that would freeze off the flow after running for an hour or so in a cold day. The flow of the propane is very cold and the water would freeze and clog the hose. When I removed the regulator I found about 1-2 oz of water in the bottom fitting. The propane guy told me there was no way it came from the propane.
2001 Winnebago Minni - 31C
Ford E450 - V10 Triton
Tow - 2005 Jeep Liberty
Unplug & reconnect every electrical connector you can see concerning the heater. Sometimes connectors get corroded, do the same with any module or anything else you can see, this sometimes cleans connections by the scraping together of the terminals, also twisting terminals slightly before plugging modules etc back in can help with internal connections. MAKE SURE YOU DISCONNECT POWER FIRST! This trick works many times on connectors that have not been in regular use & worked prior to it's idle time frame-good luck
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