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Re: HEATER NOT WORKING ON MAXIMUM HEAT CUTS OUT LANOS...
I would chk. and see if it has a heater blower motor resister. if its got one. on most cars its what chgs. speeds on heater blower motor. most major auto parts stores have web sites you can go to and find this out, most with diagrams.
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check radiator fluid is full the heater operates buy the radiator fluid flowing through the heater core. next your thermostat might be stuck in the open position thus your radiator fluid not heating up on cold days - no hot radiator fluid no heat. if fan is not coming on check fuse first if fuse is good check heater fan motor
Assuming that water pump is serviceable, a very good possibility that there is a blockage in the radiator. Also check that the radiator fans actually operates. Should be easy enough to check when the engine has heated up.
You have one of two situations. One would be a burned out resistor group within the heater box, this controls the voltage flow to the blower motor. The resistor group is a small(about 1 1/2 inches by 3/4 of an inch rectangular plate made of black or biege plastic with four push on connectors. This is usually located on the passenger side under the dash on the heater box. The other possible location is on the passenger side firewall under the hood Look for signs of burnt plastic first, then remove the two mounting screws and look at the inner parts. Most likely you'll find one , or more of the windings are broken. Thank you, Dana
???? by heat do you mean heater? if so then you could check for radiators getting warm on shortish runs, if this is alright and you radiator is getting hot then maybe your linkage has come off the back of your switch as did mine on the daewoo lanos 02. very poor build quality i put it down to. rarely a fuse probem? also if you have had any work done on your radiator recentley then check that the matrix hasnt just been bypassed. this can be just about seen at the back of the engine compartment at the very bottom near exhaust. it will be two smallish pipes which come from the engine running into the main of you r bulkhead and into your cab. if there are two going through bulkhead than all is fine if not they usually put a ushaped tube and connect the two together in order to bypass system and disabling heater.