heater system

1993 CHRYSLER FIFTH AVENUE
200,000 MILES • 6 CYL • 2WD • AUTOMATIC
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TRESSAL
  • MEMBER
  • 1 POST
blows lukewarm only.
Mar 10, 2017 at 4:04 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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WRENCHTECH
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 20,761 POSTS
With the engine at full operating temperature, locate the two heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
Mar 10, 2017 at 4:43 PM
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CARADIODOC
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 34,308 POSTS
Why no engine size? With no other details, test results, clues, or observations to go on, the thermostat is the best suspect. If it is cold air you want, the AC system is likely low on refrigerant.
Mar 10, 2017 at 4:45 PM