turbojimmy wrote:
dougrainer wrote:
Some of you overthink things. IF it was a sensor/thermocoupler, WHY would it light the main burner first time and then fail to keep oven at temp the 2nd or 3rd time????????????????? BECAUSE the Tstat is at fault. Doug(been here and done that numerous times)
In my case the Tstat was calling for heat but the gas valve wasn't giving it up. It started at random and then quit completely. I took it apart and cleaned it per advice I found in the interwebs but it would not function.
The OP's issue might be as simple as a Tstat, but downstream from the Tstat a gas valve has to open. If it doesn't...no heat.
1. Gas Tstats and such, you NEVER rebuild. They are not designed to be rebuilt safely.
2. The Tstat has the Temp sensor probe, the Main gas line to the burner safety valve and the Pilot tube to the pilot assbly.
3. Turn on the tstat to pilot and gas flows to the pilot orifice.
4. You LIGHT the pilot and hold the knob until the pilot thermocouple has been satisfied and the pilot stays ON
5. You turn the oven to 350, the Pilot goes to a slightly larger flame and this larger flame trips the Main burner thermocouple to OPEN the tstat to allow the gas to flow to the main burner
6. Burner is full lit. Once the interior temp reaches 350 degrees the tstat shuts down the main burner flame from its temp sensor on the roof or back wall of the oven
7. The pilot goes back to its lower pilot flame.
8. IF the oven main burner needs to light to maintain 350 degrees, the Tstat tells the pilot to increase the pilot light flame and this trips the Main burner thermocouple and the Main burner relights and the sequence starts all over. VERY SIMPLE
9. From my 39 years experience as an RV Tech, I stand by my advice to replace the Tstat. The OP has a 20 plus year old oven.
10. Last, there are some Atwood Ovens from about 4 to 6 years ago That the fix was to replace the Pilot assbly complete as this was also a cause of this problem. But ONLY, for those from about 2012 to 2014. Doug
