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Carrier furnace error code 33
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 I am getting and error code 33 on our furnace. We checked all the filters and while they were dirty they were not overly dirty. The error code is NOT changing to a code 13 like it says it will. Also, the fan is running constantly even though the t-stat is on auto and the unit doesn't fire up. ... 
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Another question regarding error code '33'. HVAC1000, you mentioned model,. I have Carrier WeatherMaker model 58SXC. Any difference of opinion as to why/what error code 33 is. Does this narrow it down for A more specific answer? You previously suggested the following. a) filter- replaced. ... View more questions Search 
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