Question about Carrier XHB123D X/Y Series Heat/Cool Air Conditioner

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Weathermaker 8000 furnance flashing code 31 blower comes on for 90 sec .. then shuts off .. then other fan goes on.. don't see any flames or lighting goin on can you help?

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31 PRESSURE SWITCH DID NOT CLOSE OR REOPENED - If open longer than five minutes,
inducer shuts off for 15 minutes before retry. Check for: - Excessive wind
- Proper vent sizing - Defective inducer motor
- Low inducer voltage (115VAC) - Defective pressure switch
- Inadequate combustion air supply - Disconnected or obstructed pressure tubing
- Low inlet gas pressure (if LGPS used) - Restricted vent
If it opens during blower on-delay period, blower will come on for the selected blower
off-delay.
33 LIMIT CIRCUIT FAULT - Indicates

Posted on Nov 05, 2009

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