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Blower Motor Switch Replacement Cost

Know what price you should pay to get your vehicle fixed.

The average cost for a blower motor switch replacement is between $85 and $155. Labor costs are estimated between $52 and $100 while parts are priced between $33 and $55. Estimate does not include taxes and fees.
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What is an HVAC Blower Motor Switch?

The heating ventilation and air conditioning (HVAC) system uses many components to heat and cool the air inside of the vehicle, and it uses the blower motor to push that air through the vents. But you would not want the blower motor blowing all the time so the HVAC blower motor switch is used to control when the blower motor runs, and how much air it should move through the vents.

How does an HVAC Blower Motor Switch work?

Installed either in the engine compartment and against the firewall or underneath the dashboard in the HVAC central housing, the blower motor sits dormant until the blower motor switch is activated by one of the vehicle's occupants. The switch is normally mounted on the instrument panel, and most times there are at least four or five fan speed settings. When the switch is turned to one of these settings, that circuit becomes active, and the blower motor resistor will change the speed of the fan accordingly.

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What are the symptoms of a bad HVAC Blower Motor Switch?

This switch fails in one of two ways, and both are easily recognizable. If an issue with the switch causes a short from power to one of the various fan speed settings, the fan will blow in that setting whenever the vehicle is turned on. Additionally, if the contacts inside the switch begin to fail, the fan may not work in at least one setting, or perhaps all settings.

Can I drive with a bad HVAC Blower Motor Switch?

A faulty HVAC in a system is not typically a driveability concern, and normally the vehicle can be driven indefinitely. The comfort and safety of passengers should be considered, especially in temperate zones. In extremely hot or cold climates such as the northeast or southwest United States, blower motor failure in the vehicle could be a risk factor for children and seniors.

How often do HVAC Blower Motor Switches need replacement?

Blower motor switches do fail, but it is impossible to predict the failure. Frequent use of any part will eventually lead to wear and tear, and the switch for the blower motor is one of the most frequently used portion of most vehicles. Also, the location of the switch in relation to the cupholders and sunroof is also a risk factor, as rainwater and spilled beverages are likely to contact the switch.

How are HVAC Blower Motor Switch issues diagnosed?

A blower motor that does not respond properly to the HVAC blower motor switch requires the testing of the entire circuit, and will likely result in a diagnosis of the HVAC blower motor resistor. However, the HVAC blower motor switch does fail, as well as the HVAC control unit microprocessor. Due to the history of blower motor resistor failures, the blower motor resistor will be inspected for visible clues first. If the resistor appears to be in good working condition, the HVAC blower motor switch and HVAC control unit will be tested first as an assembly by changing the setting of the HVAC blower motor switch and testing for a resulting change at the connector for the HVAC blower motor resistor. If the readings are inconsistent with the position of the switch, the switch will be tested, as it may not be sending the proper signal to the HVAC control unit. After finding that the changing the position of the switch is not sending the proper signal to the control unit, it will be understood that the problem exists in the switch, given that the switch has power. This bottom-up diagnostic approach may take longer in this scenario, but it is necessary because the resistor is the most likely component to fail in lieu of obvious damage to the HVAC blower motor switch.

How are HVAC Blower Motor Switches replaced?

Disassembly will have already been accomplished during testing, so the only procedure needed is to un install the switch from the HVAC control unit, and install the new switch. On some models, this may require replacement of the entire HVAC control unit, or the switch may disconnect by a solitary electrical connector. Once the HVAC control unit of HVAC blower motor switch is replaced, the control unit can be remounted in the instrument panel, and any trim can be replaced.

RepairPal Recommendations for HVAC Blower Motor Switch issues

RepairPal recommends testing of components prior to replacement. Especially in the case of the HVAC blower motor switch where there are multiple components that will cause the same issue, testing can prevent frustration and unnecessary costs.

What to look out for when dealing with HVAC Blower Motor Switch issues

Failure of the HVAC blower motor switch will cause the exact same symptoms of a failed microcontroller (the HVAC control unit), or the blower motor resistor. Diagnosing these three components will be necessary to locate the true problem, and avoid replacing unnecessary parts.

Can I replace the HVAC Blower Motor Switch myself?

Diagnosing the switch should be done by the DIYer with adequate experience with electrical and computerized electrical systems. At the very least, a basic understanding of electrical circuit testing is required. Replacing the switch can be done by nearly anyone so long as care is taken not to damage interior trim and other components during removal and installation.

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