No heat in my 91 sedan. Replaced heater core, thermostat, radiator, overflow reservoir, water pump, flow tee, and actuator to control door open/close position. Still no heat, what should i do next?

Asked by Oct 24, 2014 at 08:50 AM about the 1991 Cadillac DeVille Base Sedan

Question type: Maintenance & Repair

2 Answers

Buy a new car.

For real though: One or more heater & AC (HVAC) air delivery and/or temperature mode door actuators may fail. This can result in incorrect air delivery or temperature. If this happens, fault code(s) stored in the HVAC control module should be available to assist with figuring it out.

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