Question about 1991 Cadillac Seville
I have a 91 Cadillac Sedan Deville that has no heat. We have replaced the blower motor and it blows cool air. All the hoses have been checked and there is no overheating problems so the thermostat is fine. We suspect there is something going on with the heater control module. Do you know where I can get a diagram of the heating system to show where this is located? Thanks for your assistance.
I would beleive more that you have build up in the heater core. Try taking loose the heater hoses from the block and use a water hose to spray into one of the hoses letting it come out the other hose then switch hoses with the water hose and keep reverseing for 2/3 times each hose. sounds like stop leak may have been used in a prior time and may be blocking water flow.
Posted on Feb 08, 2009
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