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Ford Escort
Heater Cores and Blower Fans
Ford F-150
1995-2005 Chevy Cavaliers

What would cause the heater to heat poorly or lukewarm in a 1994 Ford Escort?

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Wiki User
2006-02-24 16:37:08
2006-02-24 16:37:08

Bad thermostat would be the first thing to check. After that, heater core. I tried replacing the thermostat. No good. I moved to the heater core. Diconnected the hoses and ran a garden hose into it to "flush" it and a bunch of black stuff came out. Hooked it all back up and works great. Not sure where the black stuff came from but it was apparently keeping the coolant from flowing and heating properly in the core.

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The coolant leak is pretty cut and dry - you have a leak somewhere. The lukewarm heat (assuming you're referring to the car's heater) could be for a number of reasons. Insufficient coolant could be one of those. Your coolant could be burnt out. It could be a problem with one of your heater hoses. You could have a worn out heater core.

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Most likely it would be a blown fuse in the fuse block.

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A leaking heater core will cause the engine to overheat because the coolant is leaking out.

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It should be. A poor draft can mean a poorly designed or a poorly built/ maintained chimney. either way, a poor draft will cause a poorly burning, smoking fireplace.

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A space heater by itself will not cause a fire. However, not following the space heater safety guidelines may start a fire. Actions that may increase the risk of fire include, but are not limited to: Leaving blankets or clothes on the heater, leaving anything flammable near the heater, and leaving the heater on in an unattended environment.

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no u cant cause it might break the heater.

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Blocked heater core, faulty heater valve, disconnected connection to the heater valve.

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THERE IS A VAC LINE OFF OR BROKEN REMOVE THE HEATER CONTROL PANLE THEN SET FAN ON LOW AND SEE IF YOU HEAR A HISSING SOUND. I HOPE THIS HELPS

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There are several things that can cause heater problems in your 1998 Jeep Grain Cherokee. The most common cause of heater problems is low fluid in your cooling system.

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with a lot of time patience, experience, and tools. Best bet, take it to a mechanic who knows what he's doing. If you dont and install it poorly, it will either leak or cause your engine to overheat and then you blow your motor. Just my 2 cents...

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Yes. The coolant carries the engine heat to the heater core. Without coolant the heater core does not get warm.

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Possibly the Heater Motor, if the fan is not coming on at all the bearing in the motor have probably gone out.

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A bad thermostat can cause a decrease in gas mileage. If the thermostat is stuck open, the engine will tend to run cold. Not only will this result in a perpetually low temperature gauge reading and poorly performing heater. It will also cause the ECU to richen the mixture, since the engine will appear to be warming up to the ECU. This will result in poor gas mileage. Replacing the thermostat will allow the engine to fully warm up, which will restore gas mileage as well as heater performance.

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No it wont. The heater core is just a small radiator inside the cabin that when the fan is turned on heats the air. A bad heater core will cause you to have no heat inside or will leak coolant on the carpet.

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a bad water pump could cause low heat. The heater uses the coolant from the pump to generate heat.

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You may smell coolant when the ac is running but a leak in the heater core won't cause the ac not to work.

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heater core could be rusty and old or line to heater core could be plogged most likely old heater core

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A blocked heater hose could cause a leak. A stopped up heater core could as well. Or the connector in the Windstar could be cracked.

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a stuck injector will cause too much fuel which will wash past the rings and get into the oil. The engine will certianly run poorly if that's what's going on.

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low water, bad thermostat, vacuum door not working, clogged up heater core, heater valve broken........

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cause the orange is for Chevrolets newer models


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