Climate Control blower runs mostly at full speed

2004 FORD CROWN VICTORIA
181,000 MILES • 4.6L • V8 • RWD • AUTOMATIC
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BERRIEMAAS
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Hi,
The blower of the climate control runs mostly at full speed. During the first few minutes after starting the car it sometimes runs at the correct speed, but then it just goes to full speed and will not slow down. When it started, it would just every now and then give a very short burst of full speed (like 1/2 a second), mostly when hitting a bump or making a sharp turn. Then it turned to that it would run full speed but when hitting a speed bump or making a sharp turn it would go to the proper speed for a second or so, now it just runs full blast almost all the time. It sounds like a loose contact somewhere. The speed controller was replaced early on and that reduced the problem a little but only for a short while. Could it be a rubbing short on the yellow/red wire #752? What is the voltage range on that wire?
Nov 5, 2015 at 8:36 AM
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WRENCHTECH
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You probably have overheated contacts at one of the plugs. Once they get hot they lose tension.
Nov 5, 2015 at 9:27 AM