The a/c blower switch needs to create mechanical connections to open and close several circuits that are necessary in regulating the speed of the blower fan. Over time, these contacts can erode and get coated with carbon, causing one or some of your ride’s blower fans to stop working.
If the a/c still kicks in and after grounding the orange/black wire at the heater control panel connector, the blower motor runs, there’s a high probability that you’ve got a bad blower switch.
Unless it’s okay for you to feel like being roasted inside your car, you need to replace your ride’s defective a/c blower switch before your next trip. When looking for a replacement, here are the factors you should consider:
It’s wise to choose a switch that’s of the same part number as your stock component. This way, you can ensure perfect fit and easy installation as the part will surely bolt onto place exactly like the original switch. While most choices out there are advertised as direct-fit components, they may not ensure perfect fit in your a/c if they are of different part number.
Compatibility with the a/c system
For the new switch to work well, it should be compatible with the rest of the a/c components it needs to work hand in hand with. So, it pays to know first the specifications of the stock before getting a replacement. Find out the stock’s number of terminals, terminal type (pin, blade, or pin-and-blade terminal type), mounting type (snap on or screw-in), and other specifications.
If you’re installing an auxiliary a/c blower switch, part compatibility can be assured by getting a switch assembly instead of buying individual components and assembling them before installation.
The price of a/c blower switches range from $30 to a little over $220. Switch assemblies generally cost higher than units that are sold individually.
Good warranty coverage
Product warranty should also be considered when purchasing an a/c blower switch as it is a sign that the manufacturer or the merchant has confidence that its products will last long. You see, some factory defects are not apparent until you’re using the component. If it gives up within the period specified in the warranty coverage, it will be fixed or replaced (whichever is stated in the warranty) by the manufacturer or the merchant for free.
A/C blower switches may come with an industry standard 90-day warranty to 3-year or 36,000-mile manufacturer limited warranty.