I have a Bryant 310AAV024070ACJA GAS furnace. Every year it will run for a few months then around December/January throw me a code 33 for a limit circuit fault. This year it throws it and then will do the cool down blower run for 4 minutes then reignite. So I'm thinking the switch is faulty. I'm not sure how to test it so I was just going to replace it but can't find a part number. This is all been googled so I may not be right...I am somewhat mechanically inclined because I work on airplanes. Any help would be great since I'm in the Midwest and my house is 57 degrees right now...
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