What is wrong with my 1995 Mercury Sable's HVAC?

  • Thread starter Thread starter nukem
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nukem

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Today, for the second time in the life of my car, the air conditioning would not turn on in my car. No matter how I attempt to turn on the heat, no air will come out. I hear a faint sound of the blower motor trying to click on, followed by nothing.

This only seems to happen during extremely cold temperatures (today averaged - 6 degrees) and even after letting the car run for a while it still will not click on.

The next day I can turn on the car and the blower motor will start fine, the air will warm normally, and everything will function perfectly like nothing happens. The only thing to note is that there is a slight smell of antifreeze, but nothing alarming.

The first time I thought it was a fluke but now I am worried. If it keeps happening I'll have no way to defrost my windows! Is something wrong with my blower motor? Is it a relay? What parts could it possibly be?
 
ok the heater sytstem though all high tech looking is really old tech in design. there is a plastic valve that the heater hoses are attached to that even with electronics still use a butterly valve that must swivel open to allow hot water to flow to the inside heater core. if the butterly is frozen closed it cant flow till it thaws free, wild guess but it fits the smell from time to time too. its worth a checking over. I dont know for certain where on the sable its located but I suspect its like most ford products on the passenger side of the engine compartment next to the fire wall. it has hoses aprx 5/8 inch size and either a cable or maybe vacuum lines operating it. good luck. I wonder if you should be running a stronger antifreeze mix than what its running
 
you have as problem with the blower motor circuit if no air, no matter what the temp, is coming out. sounds like you either need a new blower motor, a blower motor resistor (least likely), or a blower motor relay. find the relay and swap it with a good one to see if that sloves it. if not, start looking at the blower motor itself. good luck,
 
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