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i have my 95 fleet for a while. i love it but the heater wont blow heat. just cold air. i checked fluid. all level. no cooling issues. blower motor is strong. it doesnt overheat so i know the heater core isnt the issue. i was told theres a valve that opens a door for the blower to get the heat from the core. is this true?
 

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you are SURE the heater core aint clogged? Even a little clog will screw up your heat. Cadillac put them sealer tablets in the cooling system off the assembly line so 9 times out of 10 the heater cores get clogged.
 

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That doesn't mean the heater core is flowing. Pull the smaller hoses off at the firewall and hook a garden hose to one side of the core and flush it until the water runs clear. Then hook to the opposite side and repeat. Do this a few times.
 
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