My Heater/Blower has stopped operating
Moderator: RichardW
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- Posts: 98
- Joined: 19 Jan 2004, 14:48
- Location: United Kingdom
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My Heater/Blower has stopped operating
If the blower isn't working it is probably the heater motor resistor that has gone... costs a tenner and is located behind the dash. It can be got at by taking the plastic panel under the windscreen off.
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- Posts: 98
- Joined: 19 Jan 2004, 14:48
- Location: United Kingdom
- My Cars:
Got that wrong a bit (pressed submit as Outlook buggered up my message)
What I ment to say was my Heater/Blower has stopped working and I suspect the Control Switch.
I've done a search of the forum and found the info below
"If the blower isn't working it is probably the heater motor resistor that has gone... costs a tenner and is located behind the dash. It can be got at by taking the plastic panel under the windscreen off."
My question is, how do I test the resistor, and can I bypass it to see if the fan is working and confirm that the resitor is faulty?
Car is 1994 ZX 1.9TD Aura 89k miles.
What I ment to say was my Heater/Blower has stopped working and I suspect the Control Switch.
I've done a search of the forum and found the info below
"If the blower isn't working it is probably the heater motor resistor that has gone... costs a tenner and is located behind the dash. It can be got at by taking the plastic panel under the windscreen off."
My question is, how do I test the resistor, and can I bypass it to see if the fan is working and confirm that the resitor is faulty?
Car is 1994 ZX 1.9TD Aura 89k miles.
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- Posts: 98
- Joined: 19 Jan 2004, 14:48
- Location: United Kingdom
- My Cars:
At the high speed, the resistor isn't used, with the full voltage applied to the motor.
Therefore, an open resistor will only cause loss of the lower speeds.
To save yourself the acrobatics involved in the testing of the resistor, put the fan on the high speed, and check that the full voltage arrives at the motor terminal.
The fuse may be blown, the earth may be open, or the motor brushes may be worn, though that's rare.
Also ensure that the motor spins freely, for in case it was stuck.
Therefore, an open resistor will only cause loss of the lower speeds.
To save yourself the acrobatics involved in the testing of the resistor, put the fan on the high speed, and check that the full voltage arrives at the motor terminal.
The fuse may be blown, the earth may be open, or the motor brushes may be worn, though that's rare.
Also ensure that the motor spins freely, for in case it was stuck.
2002 C5 2.0i AL4 230,000 km 76372389
The fan CAN appear to fail completely when the resistor goes. I've had it happen.
The resistor is relatively easy to get at (it must be, I've done it! ). I also removed the blower and tested it with a battery charger. This confirmed that the blower wasn't knackered, but didn't show that it was stiff. It was finally replaced the following winter, after it blew a new resistor in about 10 seconds!
The resistor is relatively easy to get at (it must be, I've done it! ). I also removed the blower and tested it with a battery charger. This confirmed that the blower wasn't knackered, but didn't show that it was stiff. It was finally replaced the following winter, after it blew a new resistor in about 10 seconds!
Now Citroenless for the first time in 20 years
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