Can a bad fan clutch cause an AC to not work?
The guy calls back and says the fan clutch for the radiator is bad. He can run a hose on the radiator and the air is cold but the truck doesn’t over heat. Does that sound right to anyone? Why wouldn’t the engine over heat if the fan wont spin, and why would this problem cause the ac not to work?
Why does my heater not work on high speed?
Heater blower motor will not work on high speed? I have replaced the black bosch relay behind the glovebox, the blower resistor and the blower motor and still cannot get the blower to work on high. I remember in older model years of gmc’s and chevys that their was a high speed blower relay that caused this issue.
What to do when your AC Fan is not working?
Checked for incoming resistance ground to the blower, from the dash control switch and it works. Checked for battery at the blower, when the car is running. There is no battery to operate the blower. Rotated all the PDC relays around, they have the same ID, other than ABS pump.
Why does my AC blower motor not work?
The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all. This may also cause the blower motor to work intermittently.
What happens if your fan clutch goes bad?
A properly-functioning fan clutch is critical to engine reliability, as it works to maintain a safe temperature range. A failing fan clutch could leave you stranded with expensive repair bills, so pay attention to these symptoms.
Heater blower motor will not work on high speed? I have replaced the black bosch relay behind the glovebox, the blower resistor and the blower motor and still cannot get the blower to work on high. I remember in older model years of gmc’s and chevys that their was a high speed blower relay that caused this issue.
How does a fan clutch work on a radiator?
A thermal fan clutch reacts to temperature of the air rushing over it from the radiator. As the radiator heats up, the air passing through it also heats up. This heats up a small bi-metallic coil in the face of the fan clutch, releasing an internal valve.
The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all. This may also cause the blower motor to work intermittently.
The guy calls back and says the fan clutch for the radiator is bad. He can run a hose on the radiator and the air is cold but the truck doesn’t over heat. Does that sound right to anyone? Why wouldn’t the engine over heat if the fan wont spin, and why would this problem cause the ac not to work?
What are the different types of fan clutch?
How The Fan Clutch Is Controlled. There are two types of fan clutch: thermally-controlled and inertia-controlled. A thermally-controlled fan operates by temperature, with the engine’s radiant heat causing the fan to engage or disengage. Two types of thermal control can be found: spring-operated and electrical solenoid-operated.
How does a torque limiting fan clutch work?
A torque-limiting fan clutch reacts to engine speed. A centrifugal valve opens to allow the flow of heavy silicone fluid, locking the fan blades to the pulley. At idle and low engine speeds, this fan clutch is fully engaged, gradually disengaging as engine speed increases.
How does a rear wheel drive fan clutch work?
Most of these are large, rear-wheel drive vehicles with large displacement engines. There are two types of fan clutch: thermally-controlled and inertia-controlled. A thermally-controlled fan operates by temperature, with the engine’s radiant heat causing the fan to engage or disengage.
Why does my AC clutch cycle on and off?
This switch is designed to make sure that the pressure stays at a consistent level so that the AC can function correctly. As this switch continuously cycles on and off, the AC system operates its electrical contacts which subjects the switch to a high amount of wear.
What happens if you dont use the clutch switch?
Without the cycling switch to activate the compressor’s clutch, the AC system will not be pressurized correctly, and the system will be unable to produce any cold air as a result. If you begin to notice that the AC system is no longer functioning as it used to, and you suspect that the clutch cycling switch may have a problem,…
When to look for an AC clutch switch?
If the switch is not operating correctly, the AC system will not be pressurized correctly and will not work as efficiently in cooling the air. If you notice that the AC is no longer blowing the same cold air as it used to, you may want to consider looking at the switch. 2. No cooling at all