condenser fan runs when A/C switched off

Old 05-31-13, 04:36 PM
Thread Starter
Join Date: May 2013
Location: usa
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
condenser fan runs when A/C switched off

Ok, this has got me stumped. My A/C condenser fan runs when A/C is in off position. But once I turn A/C on the breaker trips. I checked the contacter and it seems to be working, unplugged all the fan motor wires and still does it, but when i unplugged all the compressor wires the fan does work correctly and the breaker does not trip. Is it the Compressor? or am I missing something?
Old 06-02-13, 09:31 AM
Join Date: Aug 2008
Location: Texas, California
Posts: 1,423
Upvotes: 0
Received 8 Upvotes on 8 Posts
Hard to understand, but sounds like a shorted compressor.
Old 06-02-13, 09:44 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,967
Received 4,149 Upvotes on 3,726 Posts
Welcome to the forums.

That must be a single contact contactor ?

Normally when there is no call for AC and the contactor is open.....the fan and compressor no longer get the required 240 VAC. Since the contractor is a single contact model that would mean that half of the supply is being delivered to the equipment even with contactor open. Then since your compressor appears to be can return 120V to your fan.

Your fan should have been spinning slowly...... not full speed.

A make and model of your outside unit will probably be needed here.
Old 06-02-13, 12:03 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 6,532
Received 95 Upvotes on 88 Posts
It sounds like a shorted compressor and a poor or missing ground connection to the unit. This can become a lethal combination.
Old 06-02-13, 03:57 PM
hvactechfw's Avatar
Join Date: Jan 2011
Posts: 5,491
Upvotes: 0
Received 4 Upvotes on 4 Posts
stop..... call a pro!.........................

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: