Question about Heating & Cooling
Have a Bryant model 394ga1024075 when I call for heat the pilot comes on but when the gas valve comes on it lites for a second then gos out. Ive replaced control board , spark igniter gas valve and pilot assm. still same problem. there are no roll out switches on this unit
Check the gas pressure and/or gas line to see if it's it plugged
Q. does it pop when it goes out???
Posted on Nov 14, 2014
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Posted on Jan 02, 2017
OK, if the furnace is not lighting for even a few seconds, you have either a bad gas valve, bad wire, bad control module or no gas. The pressure switch is not the issue. Check all wires to the gas valve and look for 24 volts across them when the ignitor glows and you hear the click. Then test for 24 volts to ground. It could be a bad ground wire.
Posted on Oct 21, 2008
that s correct the control is done by the thermostat stop the heating up to your set point and restart if the medium temp is under the set point
if this sequence fail means
- no power to the control element or is defective
Posted on Apr 27, 2009
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