AC is icing up but not cooling

smkettner wrote:
For icing up:

Assuming you have a wall thermostat you should have a freeze sensor that needs to be right up on the evaporator. These are notorious for falling away due to poor installation.

Secondly while you have removed all the interior trim to find the freeze sensor, check that the divider that separates the air in and air out plenum is well placed and sealed to prevent recirculating of chilled air.

But I find it odd you say it is iced up and the tech says a needs a new unit. Are you sure it is iced up? Usually they will blow cold air for at least 20 minutes before the ice interferes with cooling.

Pay attention to this reply.....all good advice especially about the freeze sensor :-)

My poor old Dodge 2500 has a bad freeze sensor but it's located deep under the dashboard, impossible to get to without 5 hrs of labor.

So when its humid out and the coil freezes over we just shut the AC off and in a few minutes all is well again when the ice melts :-\

Ron W.

For icing up:

Assuming you have a wall thermostat you should have a freeze sensor that needs to be right up on the evaporator. These are notorious for falling away due to poor installation.

Secondly while you have removed all the interior trim to find the freeze sensor, check that the divider that separates the air in and air out plenum is well placed and sealed to prevent recirculating of chilled air.

But I find it odd you say it is iced up and the tech says a needs a new unit. Are you sure it is iced up? Usually they will blow cold air for at least 20 minutes before the ice interferes with cooling.

Make sure the fan is set to high speed. If it`s not the evaporator coil might be freezing up.

I'd get a new one instead of spending a grand on the old one.