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View Full Version : Blower/Fan Problem


sidney1
06-09-2007, 12:34 PM
My installers are coming Monday. I just wanted to get an idea of what the problem could be. A new Heat Pump system was just installed however the inside blower unit will not shut off. The only way for me to stop the fan is to remove the t-stat from its housing. The fan then cycles off after about 90 seconds. It will not shut off otherwise. Assuming that the t-stat itself is not the problem, what could the problem be? - t-stat wiring, fan relay, etc. I searched the site and found that this is not an uncommon problem but didn't see anything about the fan shutting off only when removing the t-stat. Thanks.
BigJon3475
06-09-2007, 12:54 PM
It's probably wiring issue would be my guess. When you put the t-stat back does it automatically start back on with all the settings still off?
sidney1
06-09-2007, 12:57 PM
yes, as soon as the t-stat is "plugged" back in, the fan starts.
(the reason that I am asking this question is that the HVAC expert of my installers will not be available for a week and the guys coming Monday are sort of the B team. I would like to have some suggestions if things don't work out.)
BigJon3475
06-09-2007, 01:06 PM
This should be pretty basic and I would think anyone decent in the company should be able to fix this fairly easy. Sorry you have to wait so long. You could have the instruction for the t-stat ready for them when they arrive it probably says in there the way it should be wired.
Airmechanical
06-10-2007, 09:29 AM
did ya try turning the fan setting to "AUTO"



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Gunslinger
06-10-2007, 10:04 AM
Did it ever work correctly? If not, it is possible that they installed a heat strip kit, removed the jumper plug, and forgot to connect the control plug from the strip to the airhandler. I did just that on a Ruud but found it during my ops check before I left.
sidney1
06-10-2007, 10:33 AM
Gunslinger, you may be on to something. The heat strip that they received was the wrong model and didn't fit. The correct one will be installed tomorrow. Do you think that having no heat strip could be the problem? And yes, this is a new system so it never worked correctly. And yes I had it on Auto, and Off and the fan continued.
Gunslinger
06-10-2007, 10:35 AM
they need to make sure the jumper plug is installed if no heat strip is connected.