CB 1200 exhaust blower

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kknewa

New Member
Nov 14, 2022
1
Deer Park, WA
New to the forum here, but seems like lots of knowledgeable folks who might be able to help me. I've got a quad cb1200 freestanding that's about 8 years old. This winter it seems to be having an issue with the exhaust blower going on and off. Will go from regular acting, fast, flickering flame to tall lazy flame. Back and forth. Sometimes stove will run great for longer periods of time, other times the exhaust fan will cycle on and off several times over a minute span. Feeder and convection fan all run normally during this time. I clean it regularly, both the stove and exhaust path so I don't think that's the issue. Just replaced the control box and number 2 snap disc
Didn't solve it. What else should I be troubleshooting? Just ordered a new thermocouple to give that a try. Thanks in advance.