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Old 07-07-2010, 08:01 AM   #1
Skibu
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Heater fan blower problem

From this post you can tell I'm new to this and have probably incorrectly posted this in the wrong place.

I have a 52 plate focus, and my inside blowers do not work on speeds 1-3, but 4 is fine. After looking online I discovered the fault was with the Fan Blower Resistor. I have now replaced this 3 times in as many months and tried something new each time and still it keeps breaking, so I was hoping somebody would be able to give me advice as to where the problem may lie.

Problems I have considered:
Getting damp - Therefore last time I moved the resistor to sit inside the cockpit of the car so no outside moisture can get to it.

I am starting to think the problem must be electrical, but have no idea of how to check, as the fuses all seem fine.

Many thanks

Skibu


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Old 07-07-2010, 04:32 PM   #2
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if the blower is drawing to much amperage it could cause your resistors to blow.
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Old 07-07-2010, 05:06 PM   #3
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Get the blower motor stripped down and check/replace the brushes. Worn brushes can cause excess current draw which would give the problems you are having.
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