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What is the cause of air conditioning blower switching to defrost instead of dash when accelerating up hill on a 1998 dodge b1500 van Already tested for vacuum leak none found?
Wiki User
∙ 11y ago
Low vacuum, an external leak, or a leaking vaccum check valve are the only causes.
Low vacuum, an external leak, or a leaking vaccum check valve are the only causes.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoLow vacuum, an external leak, or a leaking vaccum check valve are the only causes.
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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.
What is the can with vacuum lines attached in wheel well of your F150?
It is for vacuum storage. It keeps blower mode from switching to defrost when accelerating. The mode selection is vac controlled and will default to defrost when vac is lost or low. This stored vacuum keeps that from happening
Why do most air conditioning systems not need a defrost system?
Dont no
What would cause my air conditioning on my 2003 F-150 to blow on defrost?
A fan in the system.
Why is my 2003 trailblazer stalling while idle and heater is on?
If defrost is on it could be your compressor going bad. See what happens when you leave off defrost or disconnect your compressor. It only controls defrost and air conditioning. I had the same problem
Why do most air-conditioning system do not need a defrost system?
Because most air conditioning systems operate at a temperature above the freezing point of water.
Why do most air conditioning system do not need a defrost system?
Because most air conditioning systems operate at a temperature above the freezing point of water.
What is the switch under the air conditioning controls on your 2003 Jeep Wrangler for?
rear wiper, rear defrost
Why does your Air conditioning go from vent to defrost when accelerating?
Mainly because you don't need a fogged up windshield if you are driving fast. Seriously, the defroster setting is where most autos go to if there is a problem with vacuum. If nothing worked in your dash controls, the one thing you would still need would be the defroster, so that is the default setting. Now, when you accelerate fast, the throttle is wide open, and there is no vacuum, or it is very low, so with low vacuum the control reverts back to defrost. It would be the same as if you un hooked a vacuum line and did not feed your dash controls, you would only have defrost.
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?
The fastest way to clear moisture from your windshield is by using what?
Start driving with your air conditioning on defrost, the AC will defog the windshield but you need to be moving.
1995 ford ranger when fan is on defrost air conditioner comes on at the same time Is this a switch problem?
When you select the defrost setting , the air conditioning compressor will kick in and out to help dehumidify the air , that's normal to hear the compressor kicking in and out
