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Why would your heater not work on high speed but would on the lower speeds on a older GM truck?
Wiki User
∙ 14y ago
That would depend on what you mean by "older". It is either a bad switch, if not a computerized climate control system, or it is a resistor/variable speed blower motor control. If it is the resistor type control, it is usually found mounted on, and going in to the blower motor housing under the dashboard under the glove box. In some vehicles, they can also be located in the engine compartment bolted to the firewall on the passenger side, and going into the blower motor housing from the outside.
Wiki User
∙ 14y ago
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Is there a relay switch for the heater on a 1994 Chevy truck?
Only for the high speed blower function. The lower speeds go thru the blower motor speed resister.
What is a resistor block for on a Dodge Caravan?
The resistor block or blower motor resistor is used to control the speed of the blower motor. That is how you get the lower speeds on your air conditioning or heater. The higher the resistance the lower the speed of the motor.
What is the speed lower than the speed of sound called?
speeds lower than the speed of sound is known as the subsonic speed. speeds greater than the speed of sound is supersonic (mach 1) and speeds that are many times above the speed of sound (above mach 0) are known as hypersonic sounds.
Why does my 2001 Chevy Prism heater blows hot air on highest fan speed but the lower speeds it blows cold air?
It has a bad "Blower Motor Resistor" The fan switch itself is fine.
How do you fix heater fan when it stops working on a 1994 Chevy s10?
If you have no blower speeds at all, first check the fuse. If the fuse is okay I would suspect the blower speed switch and its electrical plug has melted. If the switch checks okay I would suspect the blower motor is bad. If you have high speed only, I would replace the blower motor speed resistor. If you have all lower blower speeds but no high speed, replace the high speed relay.
Why car crashes more dangerous at higher speeds than at lower speed?
Higher g's produced at higher speeds are harder to survive.
Why does my 92 Mazda 626LX car heater and AC work on lower settings but cut out completely on full power?
Your '92 Mazda 626LX car heater and AC might work on lower settings but cut out completely on full power because of a faulty rheostat. The fan speeds will not work correctly when this part is bad. Generally the high speed function bypass's the blower speed resistor. The high speed function uses a relay instead. I would start with checking the high speed blower relay.
What causes the heater blower motor in a 2003 Trailblazer to not work in speeds 1-3 but works in speeds 4 and 5?
Probably the blower motor speed resistor is partially burned out.
What causes the heater blower motor in an 2002 Chevy silverado not to work in 1-2-3 speed but 4-5 speeds work fine?
the heater fan resister,it is or should be on inside or on outside heater box.
Is there a relay for the blower motor in a 1989 dynasty?
Only for the high speed. The lower speeds are controlled with the use of a blower motor speed resistor.
What is the resistor?
The resistor for the HVAC blower motor gives you all the lower speeds. High speed is separate.
If 2000 dodge ram heater blower motor has high speed only what is the issue?
If it has only high speed, the blower motor resistor has to be replaced to get all speeds back.
