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Mark Henley
Mark Henley, Journeyman Technician
Category: HVAC
Satisfied Customers: 3217
Experience:  UA Journeyman Pipefitter , HVAC, Refrigeration, DDC controls. 26 years.Commercial & residential
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have a code 33 on carrier infinity system, says limit circut

Resolved Question:

have a code 33 on carrier infinity system, says limit circut and high heat is active,,, how do I fix
Submitted: 5 years ago.
Category: HVAC
Expert:  Mark Henley replied 5 years ago.

Hi,

 

You can look for a device like the one in the photo and reset it, these are located on the burner rack, let me know, other than that it will be the high limit switch which does not have a reset.

 

graphic

 

Thanks

 

Mark

Customer: replied 5 years ago.

Ive reset the limit switch.. didnt seem to be popped,,, and it does it within 2 hrs of running,,,,,,the system is new just put in about 3 weeks ago..... where is the high temp one located............ your pic didnt come thru.... my email is XXXXX@XXXXXX.XXX

 

thanks..

Expert:  Mark Henley replied 5 years ago.

graphic

 

There is a picture of a high limit switch it inserts into the heat exchanger, but if the furnace runs on a startup and then shuts off on high limit then it won't be the other one I posted, it will be this one. These are suppose to reset when they cool down, does that happen ?

 

If you can't see th pictures tr to get to this web page,

 

http://www.justanswer.com/questions/2qje8-code-33-carrier-infinity-system

 

Thanks

 

Mark

 

 

Customer: replied 5 years ago.
well if we take the door off where the switch on the door it resets,,,,but it shouldnt be bringing up a code every two hours??? is this sensor bad?
Expert:  Mark Henley replied 5 years ago.

Hi

 

It is either overheating or its defective, more than likely its defective.

 

Thanks

 

Mark

Mark Henley, Journeyman Technician
Category: HVAC
Satisfied Customers: 3217
Experience: UA Journeyman Pipefitter , HVAC, Refrigeration, DDC controls. 26 years.Commercial & residential
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Mark Henley
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HVAC Controls DDC
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UA Journeyman Pipefitter , HVAC, Refrigeration, DDC controls. 26 years.Commercial & residential