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I HAVE A 1993 CADILLAC. I BELIEVE THE HEATER CORE IS OUT. THERE IS NO WATER IN THE DASH BOARD OF THE CAR. I'AM THINKING I MY NEED TO REPLACE A HOLES. WHAT DO I DO?
Hi these could be unrelated, firstly check the heater blower fuse I had an A4 and the fuse had melted stopping the blowers from working, Im assuming yours is the digital type? anyhow if its not the fuse then Im afraid you have a more seriuos problem with the water on the floor it sounds like the heater matrix has burst this is the small radiator behind the dash that circulates the hot water for the fan to blow in. Although the water could be coming in from under the bonnet this is common on vw/audi's just under the windowscreen with the bonnet open below the wipers you will be able to see down into skuttle panel they sometimes get clogged up stopping the water from running off, and into the car instead there is small drain holes you will be able to see upon inspection leafs and muck normally clog them up.
If it is the heater matrix then it will be quite expensive!
the core is under the middle of the dash - look in under hood - you will see 2 aluminum pipes going behind motor into firewall - these are a/c lines - close to this you will also see 2 black hoses about thumb size - these are the heater hoses to the heater core - the dash might have to come out to get heater core from a/c fan housing
Cooling fan is controlled by ECM But does have a sensor located under the upper radiator hose at cyclinder head.Yellow & Black wires also check the connector for corrosion,replace also if corroded!! Heater Fan Check for power & ground At blower motor under pass side of dash.One connector.
when u do this take your time, don't force anything, if it wouldn't come out then u missed a retainer somewhere, also the heater core requires taking apart the air ducting, and make sure everything is hooked back up, take allot of picture's before hand to document where everything goes, the manuals are for professional factory tech's and they assume allot of basic knowledge, in other words they don't spell out every little detail.
under the hood on the passenger side is where the motor is located.there are 3 or 4 screws that hold it in place and once you remove the fan motor youll know if its bad or not. the bearings may be worn out on it.
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