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Heat in cabin is on all the time, cann'ot turn off,AC compressor

Heat in cabin is on all the time, cann'ot turn off

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  • Duane Morse
    Duane Morse May 11, 2010

    sounds like a faulty switch in other words the fan refuses to shut off ?



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2 Answers

If my freezon would be low then why is it very cold air when I'm going on the road

because the temp difference between the hi and low side will be greater faster than a normally charged system the reason it cycles off is the keep the evap. from freezing up, but running to low on Freon can cause poor lubrication in the compressor causing damage to the compressor, yes it will blow very cold for a short period of time with a low charge

Oct 14, 2015 | 2004 Dodge Neon

1 Answer

AC compressor clicks on and off while running?

the compressor will cycle on/off when the cabin temperature is reached
the larger pipe will be cold to touch as it is the suction line for the compressor
if you have a problem with the ac ,it will not work the compressor at all and the lines will not get cold
When in doubt take it to an accredited ac specialist shop and have the system check out.

Aug 11, 2015 | 2000 Cadillac Escalade

1 Answer

Aircon doesn t turn off even i switch off

Need a little more info but typically upscale cars will run the AC compressor even when not needed. This assists the car with humidity control in the cabin, the heater can easily heat the air that just got cooled and removed some of the moisture. Look for an economy setting, or a way to turn climate control off.

Oct 25, 2013 | Acura Cars & Trucks

1 Answer

Heating, AC and vent problem

The actuator door that is behind the dash that closes off the heater core from shooting hot air thru the vents might be your problem. When you turn on your ac the actuator shuts the door to prevent the air from flowing thru the heater core into the cabin, this may be your problem if everything else is working properly. Let us know.

Oct 03, 2013 | 1995 Buick Park Avenue

2 Answers

2003 BMW 325i a/c compressor won't turn on

either low gas or a the compressor soloniod /clutch packed up their the two most common causes

Dec 19, 2012 | 2003 BMW 325

1 Answer

I have a 96 windstar and when i turn the heat on the a/c compressor starts up. how can i disconnect the compressor or fix the problem?

In some heat settings the A/C compressor will run to remove moisture from the cabin. There is a connector on the a/c compressor if you want to disconnect it.

Nov 13, 2012 | 1998 Ford Windstar

1 Answer

My libertys heater only blows heat when I'm giving

first off all if a/c gas presssure is low or no gas at all ( because of some reason you have already lost it) it acts exactly how you you describe. kicks in and out. but cant cool air inside. (first make dealer check it for leaks and let them fill it with proper yellow flourescent dye added gas)

limited het in cabin heater is another issue. if engine is warm and still not enough heat inside, we can say that you have a clogged cabin heater or air pocket is in hoses connected to cabin heater. you need to bleed cooler radiator inm front. you need to raise infront of car and bleed it with bleeding screw. after this check the heat again if still not enouh heat you may need to replace cabin heater.

if engine is not warm enough when you drive slow or let it idle. this means you have a broken thermostate or it is stuck half open.

Aug 02, 2011 | 2003 Jeep Liberty

1 Answer

The ac in my 2006 dodge 2500 gas engined truck does not blow cold when the engine is at idle. when running normal speeds the air gets cold

start by cleaning or replacing your in cabin air filter. check to see if your AC condenser fan is turning when the AC is turned on. Make sure the front of the radiator is not clogged with bugs, mud, etc. Check AC compressor relay-make sure the compressor clutch is turning the compressor with engine at idle. lastly check for proper refrigerant charge.

Oct 13, 2010 | 2006 Dodge Ram 2500

1 Answer

My heater blows hot air even when it is turned off also my ac wont work

I just repaired one with this problem. The selector knob for heat/cold was cracked inside where it slides onto the stub that sticks out of the dash. It felt like it was working, but really it was in a bind and just felt like it was working. Also, there is a selector that diverts the hot air into the cabin, or it lets outside air in, or it recirculates the cabin air. I think the selector knob is your best bet. Mainly because the heat is working and the air is not. If it happened to break while on heat, the ac will not work when the heat is on. You can try to switch the other selector to defrost and see if the ac compressor kicks on. There is also a fuse for the compressor, so check that. If all that checks out fine, check out the diverter in the dash. Usually this is vacuum operated, sometimes electric. But, if it is vacuum, the problem may not be the unit itself. It can be a vacuum leak somewhere under the hood that is leaking so much vacuum that there is not enough left to operate the other accessories. Sometimes on older vehicles, the vacuum hose will split where it is slid on a connection. The connection, or tube is usually somewhat larger than the hose and being in a stretched position for years and exposed to the engine heat, it will finally fail. Most times when this happens, you can take the end of the hose off of the barb fitting, cut it off just above the split, and install it back on the connection or fitting. I would check all the hoses in the vicinity of the engine and look at the ends of all of them. Your engine may still run, but that is because there are "limp" modes built into the computer controls that allow the engine to run without some things. My first thing would be to check out the dash selector, just pull the knob off and you can turn the stub with a pair of pliers and see if that does it for you. Then, you can check the fuses, Switch on defrost and see if compressor kicks on. If it does, check vacuum lines. The part in the dash hardly ever needs replacing. I have some thirty some odd year old trucks here and that is about the only part that has not been replaced on them. Then, if all that checks out, are you sure the charge is ok on the ac? The low pressure switch, which is plumbed into the ac system, may have the ac shut down. But, make sure all the other things are checked out first. On a Ford, you can un plug the low pressure switch and jump between the two wires with a jumper wire and see if the compressor kicks on. This can be done without the engine running, you will hear the electric clutch on the compressor engage when you jam the jumper wire in with the key on. Be sure to un do it shortly because will drain your battery, and if it is on a low charge situation, don't run the compressor without enough refridgerant.

Jul 11, 2010 | 2002 Ford Explorer

1 Answer

Compressor working, cabin temp doesn't get to setting before system shuts off

sound like low side temperature sensor circuit open.check the compressor relay.

May 30, 2009 | 1995 Cadillac DeVille

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