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Why does the heat air conditioner defrost etc work but only if the fan is in the 4 position. No fan at all in the 1 2 or 3.?
Wiki User
∙ 14y ago
You need to change the blower resistor, located behind glove box.
Wiki User
∙ 14y ago
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Why is your air conditioner only coming out of the defrost in the car?
It have battery
Why does Air conditioner work on defrost only and no front vents or floor?
Vacuum leak
Why would your heat only work on defrost?
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
1998 ford explorer heat and air conditioner only comes out the defrost?
The first thing that you need to start checking for is a broken vacuum line/lines or one that has come off.............
Why doesn't heat blow out floor only?
the heat blows out the defrost when it should blow out floor vents only
Air conditioner only works in defrost position?
Not knowing what vehicle you have, many vehicles use a vacuum supplied by the engine to operate the different positions for the air to come out. When the vacuum is absent the system defaults to the defrost mode. I would check the vacuum supply hose starting at the engine for cracks, damage and disconnection.
Will the fan run during the heat cycle on a heat pump?
Yes both indoor and outdoor fans will operate, the only time 1 will stop in heat mode is in defrost the outdoor one stops briefly to defrost better,
Why would a 95 Ford Explorer AC cyle on and off when the switch is in defrost or heater position?
On my 1995 Ford Explorer when the defrost position is selected , and the temperature knob is set in the red area to get heated air to defrost the windshield , the A/C compressor will cycle on and off to help dehumidify the air, but the compressor ONLY cycles on and off in the DEFROST POSITION ( sorry if I'm misinterpretting your question )
Why heat blows out vents only not defrost or floor?
Most likely a bad or disconnected vacuum hose to the defrost/floor selector in the heater ducting.
S10 Blazer Air conditioner is not working the switch on the dash that controls the system doesn't seem to do anything stuck on flowing air out the windshield defrost only?
Check the vacuum supply from the engine. If it is disconnected or cracked the system will default to defrost only.
Why does the air conditioner and heat only come out the defrost on my 1998 ford explorer?
The doors inside the dash that regulate air movement are not operating. They may be broken or your control cable might have slipped. You will need to look under the dash to find out more.
Why does 2000 Buick Lesabre Custom Air Conditioner blow only through defrost vents?
The vacuum supply line from the engine is disconnected or broken. When the vacuum supply is cut off the system defaults to the defrost mode.
