Blower works.but not with A/C

janman69 · #1 Jul 12, 2008, 06:51 PM

Hi there, my a/c worked fine untill a few days ago but now here is my problem...the blower on my furnace (5yr old Keeprite) works fine when the thermostat is set to 'ON' but when I turn it to 'AUTO' it shuts down. My a/c works but the blower will not come on when it starts up. Any ideas?

wmproop · Jul 12, 2008, 07:35 PM

possible bad tstat
possible broken tstat wire somewhere

have you got a meter to check voltage on wires?

till you figure it out ,you can run it ,,,,,fan on and air on should cool but the indoor fan just won`t stop running,,which is how some people like to do it anyway

janman69 · Jul 13, 2008, 09:49 AM

I replaced the tstat. Same problem. Any time the air goes on the blower shuts down so I can't use my air at all or the lines freeze up. I tested the voltage and when the blower is on everything seems fine and same with the a/c wires. The problem is when the air is on there is no power going to the blower at all.

The furnace runs off a circuit board and the blower is 4 speed.

Is it possible it is a faulty circuit board?



At Ask Me Help Desk you can ask questions in any topic and have them answered for free by our experts. To ask questions or participate in answering them you must register for a free account. By registering you will be able to: Get free answers from experts in any of our 300+ topics. Accept money for answers that you provide. Communicate privately with other members (PM). See fewer ads. Sign Up!