WebDec 17, 2024 · Most car manufacturers use a series of resistors to make the heater blower motor run at different speeds. And when one or more of these resistors burn out, you’re … WebNov 29, 2024 · SOURCE: My Air conditioner only works on high. The switch that runs the blower motor for air and heat sends the DC voltage through some big resisters when it isn't set on high. (On high it sends all the power to the motor.) If the lowest speed doesn't work then one of the resisters has gone bad, or come disconnected.
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WebJan 2, 2024 · Conclusion. If your car’s heater only works when you’re accelerating, it’s most likely due to a problem with your car’s engine cooling system. The engine cooling system is responsible for keeping the engine cool, and if it isn’t working properly, the engine can overheat. This can cause the heater to stop working. WebIf your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. This is the most common failure mode. Find the blower motor … may\\u0027s existential psychology theory
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WebJan 7, 2011 · On low it runs through a resistor which may be fused. If you only have high, the low circuit or resistor is not getting current. Check fuses. Check continuity in resistor. … WebApr 22, 2012 · I put my heat or ac on and the only function that works is on high. While I like the AC on high, it sucks when I have my family in the truck and its on high the whole time. Then if I turn it off the truck gets ***** pretty quick. How or what do I have to do to fix this problem? I need to fix this fast. Any info/help would be much appreciated. WebAnswer (1 of 4): Q: “Why does your car’s AC heat only work on high?” Assuming you mean your car (mine works): on most cars, the slower blower speeds work by switching a resistor in series with the blower motor. A lot of power runs through that resistor, so: 1. It tends to burn out after some ye... may\\u0027s electrical and air tickfaw