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1993 dodge caravan heater problems

My temperture gauge was running just above the cool mark. replaced thermostat in hopes of fixing heater that blows cool air. after replacing thermostat the temperature gauge is now at normal but the heater still blows cool air?

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  • Cars & Trucks Master
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There should be a vac controlled valve on the heater hose near the firewall. If that valve fails, or something happens to the vac source, the valve will not open or close. I would check that valve and make sure it is working. Both heater hoses should be hot when the engine is warmed up.

Posted on Dec 09, 2012

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Posted on Jan 02, 2017

  • 396 Answers

SOURCE: Heater not blowing warm air. Thermostat has been

Check the water control valve behind the engine close to the firewall. This valve opens and closes to allow hot coolant to enter the heater core. It is usually connected to the heater controls with a cable. When you adjust the heater control for heat, a cable activated lever on the valve should move and allow coolant to move through the valve. The cable from the heater control can come loose from the lever, or the valve itself can become corroded and hard to move.

Posted on Oct 16, 2009

  • 22 Answers

SOURCE: 2000 dodge caravan heating problems

if you are sure that your heater core is not restricted. then try to recalibrate the climate control panel. if your a/c system is not working then DO NOT ATTEMPT THE RECALIBRATION it will make your lights on climate control panel flash codes forever.
to reclaibrate the climate control panel just have the engine running. turn the mode to vent, the temp to cold, the blower on high, then press and hold the rear wiper wash and wiper buttons at the same time until the panel lights up then wait about 2 minutes for it to run completly when completed. turn off ignition and then restart the engine try to se if you have heat again. if it doesntwork post the codes it gives you after the calibration test.

Posted on Jan 15, 2009

justuscc
  • 360 Answers

SOURCE: 1994 dodge intrepid

vacuum supply to the switch??????

Posted on Oct 28, 2008

  • 2 Answers

SOURCE: heater problem 2005 grand caravan

check the coolant level, I had the same problem low coolant level.....no hot water to the the heater coil.

Posted on Jan 03, 2009

RudolfDiesel
  • 100 Answers

SOURCE: The heater is blowing cold but the engine temperature reads high

Hi
I would first check to see if both heater hoses are hot to the heater.
if 1 is hot and 1 is cold the heater control valve is closed or the heater core is plugged.

Posted on Jan 14, 2009

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96 dodge grand caravan... blows cold on passenger side when heater on, as well controls reversed. cold is hot nad hot is cold


SOMEHOW I BELIEVE YOUR TWO INTAKE & RETURN HEATER HOSES THAT FEED THE HEATER CORE HAVE BEEN REVERSED. EITHER THAT OR a plugged heater core

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just because the gauge seems normal doesnt mean the thermostat is good, its 5 years old,and may be opening to soon, i would start by having the t-stat replaced and while thats being done have the cooling system flushed including a flush off the heatercore. i ve worked on a couple of these vans with heating problems, most were low on coolant due to a slow waterpup leak, the others with half plugged heatercores, due to the lack of coolant flushes. hope this helps.

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Kim

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