How to troubleshoot a furnace that won t turn off by stephen lilley.
Old wall heater won t turn off.
In the case where your unit won t turn off you are looking at one of two things causing the issue.
Turn off your furnace completely including shutting down all electricity running to the furnace as well as turning off the gas and examine its controls.
Gas wall heaters whether vented or unvented can supply enough heat to warm a small or medium sized room and they can operate with propane or natural gas.
Heat won t turn off separate article to see if the problem is definitely not the thermostat.
When the thermostat turns off the heaters don t turn all the way off.
However the new thermostat shows what appears to be the same behavior.
I ve completely disconnected the thermostat removed the wires and just let them hang loose and still the burners are going full speed ahead.
Change the thermostat setting up or down.
After about 30 seconds release the button.
For old wall heaters after turning the dial towards pilot hold down on the pilot gas button instead of the ignite button.
Section 2 if your furnace won t turn off after your set temperature has been reached.
Heat won t turn off.
There is no electric involved here no blowers no fans just the gas heat unit built into the wall somewhere about the time christopher columbus discovered america it s old ok.
Turn the knob or lever to shut off the gas.
Don t go calling your furnace repairman just yet though.
Turn off the breaker switch for the wall heater so no power is supplied.
If the heating system won t turn off that is if heat keeps being delivered even when you don t want it set the thermostat to its lowest temperature setting and wait three to five minutes.
If your furnace won t turn off even after your house is at or above your programmed temperature then the problem is usually more complex.
Locate the gas shut off valve which is typically behind the wall in a panel or under the house.
After turning the dial failed to produce the click of the switch turning off and dialing the temperature all the way down didn t cool the room i assumed the thermostat had failed and replaced it.
Step 1 open the case in some cases your actual casing on the heater may be held together with special screws or bolts such as stars or hex bolts.
Then press the button again to light up the pilot.
Locate the main breaker panel for the home where the fuses are located.
Troubleshooting repair when there is too much heat or when the heat won t turn off this article explains where and how to turn off the heat if simply turning down the thermostat does not stop un wanted heat coming from heating radiators or baseboards.
If a particular button is sticking down use your fingers or a pair of pliers to try to pull it back up again.
The only way to shut it off is to shut off the gas to the unit.
