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

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WRAC has E4 on display

Hi my Air Conditioner is a CARRIER WRAC unit and does not cool. it powers but the air is not cool air. the display has E4 and i have never seen this before.
can you please help?

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Re: WRAC has E4 on display

E4 means return air sensor error, if the error cannot reset may be the return air sensor is out of range or defective. But if the sensor is ok you need to replace the control board itself. The reading of return air sensor is 8k to 10k ohms @ 25deg. C temperature.

Posted on Jan 13, 2008

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Re: WRAC has E4 on display

If the return air sensor not defective you must check the refrigerant charge . may be you have loss of the charge and you have to charge the unit and check it for leakage .

Posted on Oct 22, 2012

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