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2000 Chrysler Concorde - Page 2 Questions & Answers
My heater does not get hot even with the blower on
There is usually one of two issues that will cause this condition. The first would be a clogged heater core. To test for this, with the car off and the engine cool, open the hood and identify the heater hoses. They will be smaller diameter rubber hoses usually 5/8 to 3/4 inch in diameter. There will be two hoses, one leading to the firewall and one returning from it. Trace these back toward the firewall to see how close to the firewall you can monitor (feel) them. Once you have this determined, start the engine and let the vehicle warm up. Carefully avoiding moving parts, feel the hoses leading to and from the firewall. Both hoses should be very warm. If one is hot and the other not, you have a clogged core and must have it serviced or replaced. If both hoses are very warm, then the problem you have is in the blend box under the dashboard. These are vacuum-controlled and can get leaks or can gum and and get sticky over time. If the blend door will not position internally to route air thru the heater core, you will get no heat in the cabin. You must them check for proper vacuum to the blend box, as well as verify that the heater controls are proper working. This is not as easy as it may sound, but a little investigating usually turns up results.
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