Question about 1990 Ford LTD Crown Victoria

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Weak heat in winter for years now!

Well, I am good to go till fall, but then I will need good heat. The cars runs very cool in the summer, which is great. But, last winter I blocked of 50% of the radiator to try to get some heat. That did help a bit but not really very well. I owned a twin to this car and it had super heat! When I touch the heater hoses, they get pretty warm. The car does have a new Fail Safe thermostat, and I can hear the vacuum door moving when moved from cold to hot. It does have ATC which really complicates the problem, I think There is a vacuum operated unit in the heater hose itself. I never fooled with that yet. Any ideas? You are a GURU, so I bet you can guide me in the right direction! Again, thanks for help with the pulley issue!!! John A.

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Well lets just start at the beginning the thermostat failsafe thermostats are great no doubt and not to cheap but what you need is a new 195 degree thermostat if your car was built in the south it may have had a 190 from the factory 195 is universal for north to south buy a good one not a cheap one or you will pay later the failsafe can also get cocked around a little letting the radiator overcool let me know if this helps

Posted on Jun 13, 2008

  • dudleyfs Jan 31, 2011

    I have the same problem with lack of heat. I flushed the system , installed a new 195 themostat, replaced the heater core, and pulled most of the hoses and checked for blockage. The lefvers and doors all seem to work fine and I plenty of forced air flow. I also vacuumed and used compressed air to clean the AC evaporator fins. Still no heat. I think the only thing left is the water pump. I am also going to install a couple short lengths of clear hoses in the line to the hesater core to visually check for flow to the heater core. I noticed this post was 3 years ago, but hoping someone sees my reply 0n 1-31-2011 and has a suggestion. Thank you, Dudley

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