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93 Lesabre Heater fan Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum Kiddmoney New User Dec 17, 2007, 6:10 PM Post #1 of 4 (2141 views) 93 Lesabre Heater fan Sign In I have a 93 Buick Lesabre and having problems with the heater fan turning on. The car features both auto fan and manual fan. Since the weather has been cold, the fan will not turn on (in manual or auto mode) until the car has been driving for 15-20 minutes. The time it takes to for the fan turn on varies on how cold the car is. If the car has been in the garage, the fan will turn on within 5 minutes. If it has been sitting outside, the fan will take longer to turn on. I have just replaced the thermostat thinking this was the problem, but I am having the same issue. Any thoughts on how to fix? Tom Greenleaf Ultimate Carjunky / Moderator Dec 18, 2007, 2:27 AM Post #2 of 4 (2137 views) Re: 93 Lesabre Heater fan Sign In This is probably normal and you need to select defog/defrost setting until the car warms up. Bet that will overide the delay as the system is waiting for more temp to allow for fan for just heat only but should work on other settings before it's warm. ATC systems do that and it's annoying to me anyway, T Kiddmoney New User Dec 19, 2007, 4:18 PM Post #3 of 4 (2130 views) Re: 93 Lesabre Heater fan Sign In I have tried using all the different modes including the defrost and still have this problem. This is my main concern because I can not defrost the windshield when it is cold outside. Tom Greenleaf Ultimate Carjunky / Moderator Dec 19, 2007, 10:54 PM Post #4 of 4 (2128 views) Re: 93 Lesabre Heater fan Sign In Ok: I'm not so familiar with how GM does it but the fan in auto mode will try not to freeze you or make you too hot in systems with ATC. Usually the defrost setting just lets it go but this one may not. In many they are sensing the available temp in the inlet heater hose and wait till it gets up to perhaps 120 degrees F before if will engage fan but will run anyway in defrost. If you find the inlet hose and a block with just two wires that would likely be the sensor. AYOR, that if jumped might defeat the delay idea but the rest should work. Again - that's At Your Own Risk - it works in older Fords but can't say for GM. If you can see the body of the blower motor perhaps just giving it a good tap will get it to go and that would indicate the motor itself is a bit sticky and should then be replaced. That's common but not always so consistant as you indicated. Motors that respond the the tap trick have problems with the brushes making contact, T   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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