Hi there,...open the bonnet and look where the window wiper motor assembly is and you will find a coil connected via wiring that will be you problem. they burn out quite regulary from bad termination and weathering. you need to replace the ciol....
This is prashant from india. well i am mostly into cars especially ford escort. the problem that you have seems to be with the heater coil, if the compressor and blower is working fine then definitely its the problem with the heating coil. Might be wiring issue or the coil might have gone bad. so you may need to replace.
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if you near alicante pop in and i will do it free ,the switch in the middle needs changing its a common fault and fairly easy to do ,also the blower motor could need new brushes ,the AC will not work if the blower doesnt work .but more often than not its the switch
The blower motor resistor is bad, when you have the fan on high the fan motor (or blower motor) gets full voltage. When you have the switch on any other setting it gets reduced voltage via the "Blower Motor Resistor". That part is usually fairly close to fan motor in the duct work and is held in place with a couple screws and has a plug in going to with several wires. Sometimes that plug in gets melted to the resistor and the plug (or pig tail) has to be replaced too. This should be a fairly simple fix depending on the location of the resistor. The parts should be less than $100.00
Ok, first off, check the fuses under the dash. If they're all good, does the blower work only on high speed? If yes, then you have a bad blower motor resistor, which is located under the hood, near the blower motor itself. If the motor doesnt work at all at any fan speed, make sure the wiring harness that plugs into the motor under the hood is clean and tightly installed. If it still doesnt operate, sometimes tapping on the blower motor housing will kick it on, but if that doesnt work, you may have to replace the blower motor. They are available aftermarket, and arent usually too expensive.
As the blower motor resistor begins to fail it will cause the loss of fan speeds one or several at a time. This sounds like your problem. I would begin by changing this resistor. Should be cheap, about 10 or 15 bucks.