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lennox furnace not workikng

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3.2K views 2 replies 3 participants last post by  yuri  
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#1 ·
I have Lennox furnace SLP98UH that was installed in 10/2011. Red light flashing and gives error messages E228 - unable to perform successful pressure switch calibiration and error HA608. I have tried to reset it, push GFI button, replaced batteries in thermostat, checked outside area around the pipe - seems clean. Nothing is working.
 
#3 ·
check the vent pipes outside for blockage and then call a Lennox tech if that fails. Nothng there you can fix yourself and the parts are under warranty.
 
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