Question about Jandy Lite2 LJ125 Ceramic Gas Heater

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Furnace faults out for water blockage in Coil front cover

I bought my house last year December. It has a Goodman GMH95 Furnace. It was running ok last winter, except faulting out once every other week. This year it's worse. He never makes it up to the target temperatur. What i found out so far is that water builds up in the Coil front cover where the induce blower is attached to, until it blocks the port from the pressure switch and faults out. (3 blinks) As soon as the blower stops, a lot of water runs out of the drain port on the coil cover. What could cause the blower to build up that much vacuum to keep all the water in there? My guess would be that some vent port is blocked. But where. Anybody has an idea?

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I think the drain is restricted and not allowing the water to drain fast enough. As the inducer collects water it is normal for the vacuum to increase. Is there a vent on the condensate drain to break the vacuum? If not, add one by cutting in a tee on the drain line as it exits the furnace and put a 4or5" stand pipe above the tee. Is the unit displaying any blinking lights by viewing thru a small window? If so, remove the lower panel and look on the wiring diagram for an error code to give you a starting point where to look. If you are getting a 3 blink error code, what I mentioned above may help. There should be no water leaking into the furnace, you need to figure where the water is coming from and need to stop it.

Posted on Dec 11, 2009


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