When the burner flames blows back into the ignition compartment the roll out switch shuts the furnace down . If your rollout switch is tripped you probably have a stopped up heat exchanger (exhaust air is blocked) or a leaking heat exchanger (cracked). You can check the outside exhaust, sometimes it can be clogged by ice. I would recommend calling in a service technician to find out why the rollout switch tripped. Never by pass that switch, it is a safety devise. Good luck!
I Have A Carrier 58MCA Upflow Propane Gas Furnace. I Can Get It Started And Heating Then After Several Minutes It Stops Heating And The Blower Keeps Running. I Have Restarted It Several Times And It Does The Same Thing. What Can Be Wrong?
Check your filter, if it is clogged and restricting flow, the burners will shut off. Try removing the filter and run your furnace. If it runs without any issues, change the filter. Good luck!
Set the temperature to about 26 and let it run it will come on