Fan speed control inspection at your home or office.

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Fan speed control is not working Inspection Service

The most likely cause of fan speed control failure is a resistor failure at the fan’s motor, although it can also be a defective control switch or burned-out fan motor.

Common reasons for this to happen:

  • Blower resistor malfunction
  • HVAC control panel is bad
  • Blower motor is bad

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the source and cause of the fan speed control issue, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

The mechanic will perform a thorough inspection of the HVAC system. The mechanic will check for motor operation by removing the connector and checking the condition of both male and female sides. They will probably test motor operation by connecting a battery via alligator clips to the motor’s plug pins and see if it runs direct from that source.

If the motor works fine, the next step is checking the resistor. The mechanic will unplug the resistor from its connector and check for burnt terminals. That often signifies a bad resistor. To check resistor functionality, the mechanic will use a multimeter set to the resistance function, then measure the resistances from a common point on the connector to the various pins to make sure the required Ohm values are up to spec.

The mechanic will be looking for an “open” condition (infinite resistance), which reveals a defective circuit.

Fast and easy Fan speed control is not working Inspection service at your home or office.

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YourMechanic Fan speed control is not working Inspection Service

Average Rating

4.7/5

Number of Reviews

43

Rating Summary
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Joe

40 years of experience
576 reviews
Joe
40 years of experience
Joe was very knowledgeable, efficient and willing to explain his findings and repairs performed. I liked him and will use his services again. James A. Doubek PE
2005 CHRYSLER 300 - HEATING AC - LUTZ, FLORIDA

Chris

13 years of experience
397 reviews
Chris
13 years of experience
hired for a Second Job.
2005 JEEP GRAND CHEROKEE - HEATING AC - SAN FRANCISCO, CALIFORNIA

Patrick

30 years of experience
865 reviews
Patrick
30 years of experience
Patrick arrived on time and ready to go. Unfortunately what I had originally thought the problem was turned out to be a bigger job. Patrick was through and explained everything.
2006 FORD TAURUS - HEATING AC - KYLE, TEXAS

Ben

38 years of experience
883 reviews
Ben
38 years of experience
i am well satisfied with Mr Smith working on my car(s). He replaced the Jaguar fuel pump like an expert, and then he diagnosed the VW bug ac compressor and fixed it on the spot. I would recommend him to anyone with a car issue
2007 VOLKSWAGEN BEETLE - HEATING AC - HOUSTON, TEXAS

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