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Will a coolant fan clutch failure cause heater air to be cool not hot?
Wiki User
∙ 12y ago
Fan clutch failure does not change heater output, but if clutch is old, then thermostat may be old too. If thermostat fails in open position, engine does not run hot enough. To diagnose, idle car for 10 minutes to warm up. Test temperature of radiator hose at top of engine. You shouldn't be able to hold your hand on it for more than 5 seconds. If it feels hot, but not "can't keep my hand on it hot," then thermostat needs replacement. To confirm that problem is "Running open thermostat," put pieces of cardboard infront of radiator and see if temperature gauge rises, and radiator hose gets hotter. The purpose of cardboard is to stop airflow over radiator, thus forcing temps to rise. You don't want to overheat engine, so maybe block off half the radiator and see what happens.
Poor heating can also occur if there is not enough coolant in the system, or trapped air. Buy service manual for your car and learn where the bleeder valves are. Bleeder only needs to be opened a small amount when cool engine is started. Do not attempt on hot engine.
On many cars there is a valve that opens and closes to regulate flow of hot water into heater core. Look on firewall. On some large american engines, small bits of sealant can break off inside the cooling system and actually block the valve. Probably have to remove the valve to find this. On a very old car that has not had proper service, the heater core can become blocked. Search YouTube for videos on how to unclog heater core. Messy DIY job, but very expensive for shop to replace a core.
Good luck,
Booger Vance
Wiki User
∙ 12y ago
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Will low coolant cause a cars heater to not work?
Yes. The coolant carries the engine heat to the heater core. Without coolant the heater core does not get warm.
Will a faulty clutch fan make the heat in a Durango not come out as hot?
The clutch fan will not cause this issue. The more likely causes are a stuck open thermostat or coolant not flowing properly through the heater core.
Will a leaking heater core cause your car to overheat?
A leaking heater core will cause the engine to overheat because the coolant is leaking out.
Could a bad water pump cause a car to have no heat?
Yes, if the coolant level is low, or the pump is not capable of moving coolant through the heater core.Yes, if the coolant level is low, or the pump is not capable of moving coolant through the heater core.
Cadillac heater blows cold air when stopped?
Check the coolant level. Usually low coolant levels will cause this.
What is the cause of car heater failure?
engine thermostat, fan motor,or fuse.
What would cause a puddle of coolant in the passenger side floor of a 92 Chevy corsica coolant leak?
Leak in heater core
How can you fix the heater on your 2002 Saturn?
First check the coolant level, a coolant leak would cause a heater to stop working- assuming you mean the blower is blowing but it isn't hot. A stuck thermostat will also cause you problems with your heat.
If the heater core is not replaced can it cause damage?
If your heater core is LEAKING engine coolant so that your engine coolant level drops too low or the engine coolant is lost completely and causes your engine to overheat then your engine can be damaged beside the mess the leaking coolant makes inside your vehicle ( you might be able to just temporarily bypass the heater core so that no engine coolant is flowing through the heater core )
What can cause a heater to stop blowing heat?
well you could just turn the heater off heater blower ---- If it is a car heater then check your coolant level. the heater is driven off a heat converter that is fed by the radiator system. When the coolant fails to pump round the radiator system the car internal heater doesn't work. Driving without coolant in the system will result in the engine overheating and seizing.
Why would you find coolant on your passenger side floorboard?
A damaged heater core will cause coolant or water to leak onto the passenger floorboard.
Can a leaking heater core cause your ac not to work in 03 durango?
You may smell coolant when the ac is running but a leak in the heater core won't cause the ac not to work.
