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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22681
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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My Model 355MAV keeps opening the flame compartment limit

Customer Question

My Bryant Model 355MAV keeps opening the flame compartment limit switch and flashes code 33.
I reset the limit switch and it runs for a few cycles before quitting again.
What's my problem?
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.


This means plugged or cracked heat exchanger. And this series did have its fair share of exchanger issues. Contact a local Bryant dealer..have checked, and then replaced under warranty. The ended up stretching the warranty on exchangers.