AC unit not pumping cool air?

Old 09-12-19, 12:45 PM
Thread Starter
Join Date: Mar 2012
Location: United States
Posts: 24
Upvotes: 0
Received 0 Upvotes on 0 Posts
AC unit not pumping cool air?

I have an old Trane XL90 furnace/AC unit. The fan runs but you the condenser never kicks in to pump cool air. Where do I start to trouble shoot before calling a pro? Thermostat, outside unit, etc?

Old 09-12-19, 01:43 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,484
Received 4,055 Upvotes on 3,638 Posts
Most likely the problem will be outside. There could be one of a number of problems.
1) Low on refrigerant
2) Tripped breaker to condenser or blown fuse in disconnect. (some have fuses.... some don't.)
3) Set the unit to a call for cooling and see if the contactor is closed. The contactor can be found in the wiring compartment where the wiring connects to the unit.

A meter would be very helpful in locating a problem.

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