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pilot lite stays on till i turn switch on then everything shuts off
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could be the adjustment for flame height hitting the thermocpuple. a 750 millivolt signal is generated to keep the pilot valve open. when this flame is extinguished off the thermocouple, the voltage goes to zero and the spring closes the main valve. -
First of all, what is the gas valve on. Different size gas valves need differentOriginally posted by Dad3084 View Post
amounts of power to open them, so they make different power output power piles to go with the different valves. A standard furnace with a 250 cfm gas valve needs about 240 millivolts to open the valve, so if your power pile is putting out 200 millivolts, that would keep the pilot lite, but when you try to open the main valve it robs all the power so your pilot will go out.
Make sure all wires are clean and tight. Have you changed the thermostat?
Do you use a stat or just a switch. Do you have more than 25' of wire to your switch. Is this wire going to the switch at least 18 gage?. The only way you can tell for sure is at the valve check the power coming from the power pile. Then check it after going through all the controls and switch. This will tell you how much power drop your getting. then check the power rating need to operate the gas valve..
Your problem can be weak power pile, dirty pilot or not adjusted properly,
A switch or control with bad contacts. too long or the wrong size switch wires, lose or dirty wire connection. Gas valve pulling too much power.
PaulComment
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millivolt gas valve
have 2 power piles #1 hooked to pilot #2hoohed gas valve in a series works ok what does that tell us?Comment
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one's a powerpile, one's a thermocouple.Comment
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