Question about 1987 Chrysler New Yorker

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No heat 87 chrysler new yorker. blower works. only cold air coming out. fuses ok, thermostat replaced. car isn't overheating. other possibilities besides replacing the heater coil?

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  • nkr63 Jan 03, 2009

    Thanks for the sugestion. Is the thermal coil different from what they where telling me the thermostat does? also, ther has been no smell of antifreeze and no visible leaks. I was told that sometimes they get blocked up so that water won't pass through.

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I had the same problem, first make sure radiator is full of water, and that the heater valve is working. the heater valve opens and closes by vacuum and is under the hood close to the firewall where heater hoses go into firewall to heater core under the dash. The other thing I done was to back flush the heater core, by unhooking both heater hoses from the motor and and taking a water hose with no end on it and running water through each hose one at a time. When the water flows in normal direction you probally won't see anything, but when water is run in the opposite direction you will generally see black stuff come out of it. Anyway that solved my problem.

Posted on Mar 24, 2009

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There should be a thermal coil in it. I know that mid 90's dodge trucks had it mounted under a cover in the engine compartment by where the heater coil on the passenger side. It's about 2 to 3 inches long. Check on that it actually regulates the heat from your heater. Also check for any antifreeze leaks or sweet smell from your heater, this will be the first signs of it being the heater coil.

Posted on Jan 03, 2009

  • Michael Sharar Jan 03, 2009

    I just went looking some things up and I think that your vehicle just has the valve on it. If you look at the firewall, look for where your coolant hoses go into it. You should see the lines attached to a valve. This valve has a vacuume line coming off of it also, I believe that it attaches to the intake by the throttle body. You can do one of 3 things. First you can try changing the hoses around, if someone had done some work to the car and switched hoses this will cause your problem. One line is an inlet and the other is an outlet, this is common if the hoses weren't marked. Second check and see if the vacuume line is unhooked, plugged or if it is cracked or just broken. Third you can just install a new valve or if you have access get a used one from a junkyard. They aren't expensive and if you have access to a NAPA auto store they are between $20 and $27 depending on your application. If you have a 2.2l the part number is BK6601251 and a 2.5l is BK6601223 (this is the cheaper one). I hope this helps and I'm not sure if you have the thermal coil or not but you can check. Also the main purpose for a thermostat is to regulate the engine temp.

    You can take the hoses off the inlet and outlet for your heater core and take a hose to check if it is blocked up. just figure which is the inlet, turn the water on but not to high and it should flow thru and come out the outlet. Easiest way to check it.

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