Question about Chevrolet Silverado 1500

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I have a 2007 chevy silverado classic w/t w v6. I am currently having problems with the heater. When the heater is on, the only way I can get it to work is to turn the fan switch all the way to high number 5. Other wise I cant feel anything blowing out the vents till i turn it to high. When I do turn it to high I hear a loud click noise? any suggestions

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HI. The culprit will be the actual resistor switch that you are using to operate the blower fan. This switch is damaged.The resistor circuit has failed. This is a common issue with most resistor switches. There is a seating bracket that separates the switch from the circuit. This plate may be defective. it is very small, and can become worn overtime. In most cases, this will be a defective switch.

In order to correct this issue, you will need to replace this damaged resistor switch. This will require you to remove the AC/Heater cluster control Assembly. Once the assembly is removed from the dash, the resistor switch will be exposed.

Posted on Nov 13, 2009

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Hi.

If the heater is malfunctioning, and click is a relay-like noise, rather than a noise coming from blower motor, then the heater control must be replaced.

Sometimes noise from a broken fan, a defective blower motor, or a foreign object inside the duct may be confused with clicking from control. In this second case it will be needed to access the blower motor to check out.

Regards.

Posted on Nov 13, 2009

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