most likely there is a vacuum leak. check the vacuum lines leading from the intake the the interior heat and a/c control. look for cracks around the vacuum lines. check the vacuum canister and check valve.
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Related Questions
How do you remove defrost control console?
I have a 2004 Malibu and trying to remove the radio/defrost control console
What do you do when your heat is frozen up?
If this is the condenser that is frozen, you have a problem with the defrost cycle. There are 2 things that need to be checked, the defrost sensor and the defrost control board. More than likely it is the defrost control board that is the problem and of course that is the more costly of the 2.
What is the purpose of a timer wired into the compressor contactor control circuit on a refrigeration system?
A defrost control typically.
Why is it that your car's compressor keeps on running. It stops only if you will shut it off?
More than likely, your H-A/C control is set to Defrost. In most vehicles, when this is set to Defrost, the A/C Compressor runs continually.More than likely, your H-A/C control is set to Defrost. In most vehicles, when this is set to Defrost, the A/C Compressor runs continually.
What causes the temperature control unit on your GE refrigerator to click non stop?
the clicking you hear is more then likely just a noisy defrost timer..in some ge refrigerators the defrost timer is mounted close to the temp control.
Should ac compressor stay on when heater control moved to defrost in a 2000 durango?
Yes, the ac will run in the defrost position to dry the windshield.
Does a GE refrigerator have a defrost timer in the back of the freezer?
To GE model GSSxxxx models, there is no defrost timer. It uses the main control board to time it.
Climate control in 1988 Fleetwood Brougham will not activate air conditioning. It will only turn on the compressor when set to Defrost. Any suggestions?
The climate control computer may be defective. Check all fuses. is the defrost cold air?
Why is heater control stuck on blend Wont kick into defrost or heater?
Check behind the heat control panel to be sure that the vacuum hoses are all securely plugged into the control switch. As a safety measure on all cars, if you lose vacuum altogether, the default position for air direction is on defrost, so you can always see out of the windshield. Jake McCahn
Air control won't switch from heat to defrost in your 1999 navigtor?
It's a bad vaccum line
Where is the heater control valve on a 1999 expedition 5.4 Eddie Bauer?
no heat front defrost dsah.
Why is your air conditioning fan switching from vent to defrost on acceleration?
You have a leak in the vacuum supply to the ac control.
Where is the rear defrost timer located in a 1987 ford crown Victoria?
on the back side of the heater control panel
What does the rr defog fuse control in a 1997 Chevy truck?
The rear window defrost/defog heater grid.
Why does your 03 avalanche ac continue cycling with heater on?
it should if you have the heater control in the defrost position this is to remove the moisture from the air
Why does the defroster not work when the control knob is set to defrost?
Need more detail, make and model and year would help.
What would cause a heat pump to freeze up in the winter?
Most likely a problem with the defrost control. A heat pump normally will develop ice in cold weather and the defrost circuit should get rid of it.
Can't find any place that sells the vacuum actuated heat defrost control units help?
try your local junkyard
What are my cooking options on the control pad?
Jenn-Air-Convection-JMC9158BAW-15-CuFt-Countertop-Microwave-Oven-White has control panel has options for rapid defrost, auto defrost, ten power settings, warm or hold setting, cooking time to accuracy of 10 seconds, Scrolling VFD display and easy cook adjustment
The temperature control module in your 1997 Ford Explorer?
The temperature control module for a 1997 Ford explorer is the unit that controls all of the heat and ac functions. If it is not operating properly, then the heat ac and defrost will work improperly or not at all.
Why 2005 Dodge stratus heater ac clima control blows hot air all the the time and when set to defrost it blows straight when set straight blows to the defrost?
You either have a bad controller or a bad actuator.........
What is the best way to defrost windscreen?
put the heat to maximum set the control to defrost and crack a window a little to let out the moisture in the car also make sure you set the air circulation button to outside air
Other than defrost none of the other panel air vents work on your 2001 windstar what is the cause of this?
vacuam hose to ac control is of
Why does air condition switch from face to defrost on vy commodore?
You have a vacuum leak in the fan control system somewhere... not easy to locate the leak
Why will the AC only blow out of the defrost vents in a 1990 Ford Tempo?
sounds like a vacum leak in the temperature control panel or from the engine to the control panel, the line from the engine to the control panel is black, and gets split at the panel, has the engine been running a little rough or a lack of power, this might explain it
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