Gas furnace pilot fluffy go bad messily.. nobody know why? We have a Trane gas furnace. It have several new parts...
We have a Trane gas furnace. It have several new parts including the thermostat. The problem is that the pilot fluffy goes past its sell-by date at odd times. It stood lit for a couple of months and next it goes bad all sunshine one day and afterwards the next time two times and then it's well brought-up for a couple of weeks. The days were not stormy. Then if it's not the pilot light, it's the restarting button I own to press. Why is this happening?
The chimney is clear so there's no fund draft. We have have experts come to see and they have no hypothesis. What else could be the problem???
Answers: Some furnaces have a reduce switch connected to a coupling that sits between the thermocouple end that go into the gas control valve, if this time limit switch is working intermittently you will lose your pilot. To check this you can test for continuity through that switch. It is unsafe to bypass the switch, but it can be done for a hasty test. If the switch works, I would first try replacing the thermocouple.
If this have already been done, the problem is contained by the gas control valve. Get a pro to do it. The pressure have to be set for the burners to produce the correct btu's.
Have a tech clean the pilot assembly or modify the thermocouple