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Why would the heater air be cold but when the defrost is on it is hot?
Wiki User
∙ 16y ago
You have a mode door that is stuck or the actuator is not working properly.
Rick
http://free-auto-repair-advice.blogspot.com/2007/11/finding-repair-information-you-need-at.html
Wiki User
∙ 16y ago
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Why would only cold air come out of the vent when you put on the heat or the defrost I have checked the panel switches that does not seem to be the problem?
AnswerCheck your heater core, do you smell antifreeze at all?no
What could the problem be on 1988 Ford Aerostar when AC blows air out dash vents and floor but heater and defrost do not blow any air at all?
A vacuum leak, or one of the doors is sticking/bad vacuum motor in the heater box.
1999 dodge caravan heater blows cold air?
First thing to check is open hood and feel heater hoses going into heater core located on r/s of vehilcle if sitting in driver seat.If they are both very hot and feel the same temp,blend door in heater box is not operating correctly.If one heater hose is hot and the other is cooler than chances are the heater core is plugged.In either case a professional would be your best bet for repair.Hope info was helpful.
What cause 1993 grand prix se to blow cold air on defroster setting?
A water thermostat stuck open. Air in the heater hose lines (caused by low radiator coolant). Air temperature (mechanical) control cable not opening the heater hose water valve (under hood).
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.
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?
Why does heater defrost vent not open on a 1989 Sunbird and cold air blow from dash vents but no air blows from heater defrost vents and where are the enter and exit hoses for the heater coil?
I don't know why the vent would not open for the defrost, but it may be related to the fact that your heater core is blown. If your getting nothing but cold air out of the vents when the heat is on, your core is finished and if the core is finished then it is likely related to your vent not opening/switching. Something''s wrong with your heating either way.
What would cause the defrost on a 1995 gm suburban 1500 blow cold air when the heater core is new?
alve, check vacum line first (on heater valve)
My defrost fan is blowing but will not defrost my windows?
That means either you have air in your heater core or your heater core is being bypassed
Why would only cold air come out of the vent when you put on the heat or the defrost I have checked the panel switches that does not seem to be the problem?
AnswerCheck your heater core, do you smell antifreeze at all?no
Why would a house heater blow out cold air?
It doesn't really blow it out it just warms the cold air.
Why would you smell antifreeze and heater blow cold air?
heater core possibly plugged and leaking
What could be the reasons that your 2000 Jeep Cherokee heater would randomly blow cold air and then hot air and then cold etc?
One of the reasons a 2000 Jeep Cherokee heater would randomly blow cold air and then hot air and then cold might be that there is a problem with the hot/cold duct. The air or a vent might be inadvertently blowing periodically.
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
AC fan is blowing cold air out of windshield defrost when not on defrost?
does fan door motorized or on a vaccuum line when you switch from AC to defrost?
Would straight antifreeze make heater blow cold air?
No! Thermostat.
How would the repair of the heater and air conditioning not blowing be made on a 1994 acura integra?
I own a 1994 acura integra and the heater/air conditioning blower is not working, I can not defrost my windows and the heat does not blow. What is wrong and how can the problem be fixed.
