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Heating AC and Engine Cooling
Thermostats
Ford Windstar GL
Overheating (Engines)

Why would a car overheat when the defrost is on?

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Answered 2006-07-18 21:02:33

The defrost selection cycles the AC pump, regardless of what temperature you are choosing to defrost at. This cycles the freon, and cools the evaporator (inside dash), and heats up the condenser (in front of radiator) I would check for 1. the fan working in front of the motor... 2. road debris, bugs, cotton from weeds plugging the space between the radiator and the condenser (common)

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Usually, you'll get antifreeze on your passenger floor, steam out the defrost and / or have a very noticeable sweet coolant smell in the car. The heat won't work well and the car will overheat.


Try changing the themometer


thermostats problem my car did the same thing when mine went out


He will have to defrost the windows on the car before going to work today. Most women hate to have to defrost the freezer. The meat will have to defrost before it can be cooked.


no defrost on left side of car and antifreeze draining on right side of car. What is the problem


It can if their is something wrong with the cooling system.


It will not cause the engine to overheat. You have another problem.


The radiator cooling fan is most likely not working.


Usually the car would run cool, unless the thermostat is stuck partially open.


sometime the fan do not work which can cause the car to overheat. Also it can be a fuse for the fan. Check your thermostat.


IT JUST DID SABLE WAGON -6 DEGREES no it wouldn't


If it has AC assist and the compressor is shot, cut the belt or disconnect the defrost from the compressor.


There could be many reasons. Not enough coolant or bad flow, faulty thermostat, low oil. If the coolant freezes then it will overheat. If your car continues to overheat then you should have the coolant flushed and thermostat replaced.



water pump may be locking up, causing belt to break and vehicle to overheat. have a good mechanic look it over.


He tried to defrost the window of his car with some warm water. They needed to defrost the fridge as it was a long time since the last time they had done it.


Check the thermostat or the radiator. The thermostat could be sticking or the radiator could be plugged.


Different engines run at different temperatures. It would be best to consult your owner's manual.


Your motor oil going bad would cause that. That is in the crankcase, not the transmission.


I would defrost it. Get a hair dryer and blow hot air on it.


No beaxause it can overheat and catch fire No beaxause it can overheat and catch fire



drive it without coolant


Yes, a busted head gasket might stall your car if the gasket causes the car to overheat. This can actually blow the heads and cripple the car completely.


The fastest way to defrost a windshield is to turn the defrost vent on without heat or simply open the windows. Another option is to warm the inside of the car by turning the heater on.



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