Coleman DGAA056BDTA
Posted: Thu Dec 16, 2010 5:39 pm
I had this furnace installed 3 years ago and it has constantly given me problems, it will give the 3 flash's code, the company I bought it from has replaced the pressure switch 4-5 times and replaced the booster motor once, it will run for maybe 1 month or a little longer then stop working again after replacing the pressure switch. Now it is off warranty and is acting up again. I've had a tech out from a different company and we have checked to make sure the air pipe is clear and the pressure switch is definitely opening and closing, we even switched back to a manual thermostat from the programmable one I had to see if that was the problem. Yesterday it ran all day normally cycling off and on but with the LED light still flashing 3 times and today it isn't running at all. Could it be an intermittent problem with the control board? I did read where you said the contacts in the pressure switch may corrode but this fast seems a little crazy to me LOL. Any ideas? Thank you for your time and I think I included all the info I have.