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Fan comes on butno heat - Air Conditioners

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  • Anonymous Dec 26, 2008

    My Friedrich Wallmastrer PH15 fan comes on, however it does not produce any heat?

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You prbably have a dirty filter and the unit has gone off on "high Limit". this means that since there was not enought air coming back through unit (due to dirty filter), it overheated and a saftey device called a "high Limit" shut it down. One of the signs that the high limit has tripped is the blower comes on to cool the unit down but the burners will not come on. Some high limits reset themselves when they cool down but it is safer to call a pro.
good luck

Posted on Nov 28, 2008

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Sounds like you have a hot surface ignitor that has gone out. Go down to the unit remove top cover to inspect the operation of unit. First stage is draft fan it should come on and clear out the flue about 2 min. later the hot surface ignitor starts to glow it sits right in front of the burners if no glow the ignitor needs to be replaced. let me know how it turns out. Ken

Posted on Nov 28, 2008

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Let us know if you need further assistance.
Thanks for contacting Fixya.com

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