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Re: 95 lumina fan doesn't work
Start by checking fuses....if good check check blower motor ..you can check by removing power wire from motor then with a wire hook up one end to battery ...+...postive....the other to blower motor ...if it comes on then your problem will be the blower motor relay or the switch in the dash.... ....the blower motor relay is located in fuse box under hood....hope this helps...
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Do you have heat? Does the fan turn on? are you getting air from the defroster vents close to the windshield? If you have heat make sure the defrost control is working. I'd open the outside air vent and turn the blower on high speed. If there is no heat, the heater control valve is not working. Double check the radiator fluid tank, make sure you have enough fluid (antifreeze) Low fluid levels can reduce the hot water flow to the heater coil inside the car. If there
is no air flow through the defroster vents you may have a problem with the fan control, or the fan motor. Good luck.
Sounds like a air lock in interior heater core, remove one heater hose under hood and make sure you have flow through heater core. Some vehicles have a valve that controls coolant flow through heater, check on hose for that if no coolant comming out of inter heater hoses.
Before the head gasket is condemned, the coolant fan operation should be checked, the fan should come on when the temp reaches 226 f degrees or 3/4 of the way up.
If the fan doesn't work I would replace the coolant temp sensor for the computer. Get a coolant pressure test done and if the pressure drops with no external leak I would also get a block test done if the block test fails then the head gasket is faulty.
Now if the pressure test is good I would replace the radiator.
The cooling fans won't run until either the engine coolant temperature reaches about 218 degrees or the air conditioner/defroster are on. Once the engine reaches appx 218 degrees the fan will come on and run until the coolant temperature drops a few degrees and will then turn back off. If either the a/c or defrost are turned on then the cooling fan will begin to run to remove the heat from the a/c system and should stay on until either is turned off. If the engine is overheating in slow or stop and go traffic then the fan may not be working at all due to a bad fan motor or blown fuse.
95 chev Luminas have a vacumn line running to a vacumn accumilator under driver side front fender liner that runs up to the firewall before running to switch. These are real bad about breaking. Run into this a lot.
no fan comes on when engine cold start up .but it will come on when you turn on air conditioning or defrost on .if engine idling a while when temp get 190 degree the fan will kick on.if over heating you got air in system .wait until cools check coolant add more .crank engine let it idle few. minutes when start warming up turn off engine wait a while before removing radiator cap so you wont get scald.add more coolant .crank it again starting warming up turn off engine wait a while .add coolant .keep doing this procedure until your coolant stop dropping off .if you do this more than 6 times you got a leak some where.check crank level for signs.if oil level higher than normal.if everything looking good.when engine cool make sure add coolant to over flow jug cold level mark.
A radiator fan is designed to pull air to pull air through the radiator to help cool it, while blowing the air on back across the engine to try to assist once again at keeping the unit running cool as to not over heat.