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1992 Lincoln Town Car, NO HEAT
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lookitsflanny
New User
Mar 13, 2009, 2:37 PM
Post #1 of 8
(5620 views)
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1992 Lincoln Town Car, NO HEAT
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My 1992 Lincoln Town car will only blow cold air while heat is on. This is what I've checked so far....Coolant level is good and both heater hoses are hot leading into and out of the firewall. There appears to be some sort of electronic valve just prior to going through the firewall, could this be my problem? It's a 1992 Town Car, 4.6 lt V-8 with 50,000 original miles, beautiful car even without heat. Thanks in advance for any leads you might be able to provide me with.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 13, 2009, 5:01 PM
Post #2 of 8
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Re: 1992 Lincoln Town Car, NO HEAT
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Hmmm? Not common with coolant truly full??
That whoosey in the inlet heater hose line is just a fan delay and doesn't restrict flow. These should use a "blend door" in the distribution box to mix air for desired temp. The 5.0s prior to the 4.6 used to put a solid metal restrictor for flow in inlet hose near this to slow the water flow and it was like a plug with a 1/4" hole for water passage that could plug I suppose but would think you feel the temp drop drastically on return hose if that OR a plugged core. I'm not as familiar with the 1992 as changes were underway but you should have a slider temp selection that may be the issue. The actuator doors have been very dependable and I'm guessing they could be vacuum controlled for the blend door. Look for broken vacuum line underhood more likely than under dash unless recent work might have disturbed something.
You may be able to move the blend door by hand without a total dash diving expedition - take a look.......
T
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lookitsflanny
New User
Mar 14, 2009, 2:24 AM
Post #3 of 8
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Re: 1992 Lincoln Town Car, NO HEAT
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Thanks for the info. Living in the middle of nowhere I don't have the luxury of finding a dealership to tackle problems like these, you just try and figure things out on your own.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 14, 2009, 2:50 AM
Post #4 of 8
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Re: 1992 Lincoln Town Car, NO HEAT
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I don't think this is a monster problem. Any recent dash work - radio etc? Does the temp selector feel funny? Did this just happen out of no where or come on slowly, noise anything?
T
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lookitsflanny
New User
Mar 14, 2009, 3:19 AM
Post #5 of 8
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Re: 1992 Lincoln Town Car, NO HEAT
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One day it worked, the next it didn't. I had breaks put on yesterday, perhaps they unplugged something in a lame attempt to draw me back in, kidding of course. All the slides and the switch feel sound. I'm gonna step outside and take a look at that metal valve you spoke of in the prior post. I'll figure it out before it's all over. I have a Jack Nickolous Sign model in near showroom condition, a sight to behold.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 14, 2009, 4:01 AM
Post #6 of 8
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Re: 1992 Lincoln Town Car, NO HEAT
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Don't give up - it's probably something stupid. The "metal" thing is out of sight inside the inlet hose. You would have to replace the hose to even find it and cut it out. It's like a cork with a hole drilled thru it about half of a wine bottle cork size thing. I suppose you could pinch the hose and feel for the spot that won't squish - not likely that is the issue IMO.
More likely is some funky vacuum line unplugged or look for plastic the appears more like wire but is vacuum hose and would lead to rubber connections as a way to know it's vacuum line and not wire. Those do snap like uncooked pasta sometimes and can just splice in rubber hose for windshield washer size if you do find two ends not together!
You are welcome to come to the site below my sign off - another forum with sign up there and ONLY A/C techs. Funky little sole propritorship site but gets hit by the big guys in the MVAC trade.
Side note on the car: This is generation II Town Car and not known the the problem you have by me anyway as common. The A/C is strong in those but heat stinks IMO as they all moderate the output temperature so as not to burn your feet or something. I own a bunch of older ones and they s*ck for heat - again an opinion as I like heat to be so hot you have to open the window!
More: Brakes really have nothing directly to do with the climate control,
T
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lookitsflanny
New User
Mar 14, 2009, 10:57 AM
Post #7 of 8
(5587 views)
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Re: 1992 Lincoln Town Car, NO HEAT
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I went online and got the Chiltons Manual for this boat. I'll never give up, I'll lose sleep until I figure it out but figure it out I will. I'm impressed with the configaration of the plug wires, you could power the space shuttle with the power plant I have under there, they don't make things like they used to, I prefer working on the older cars.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 14, 2009, 11:24 AM
Post #8 of 8
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Re: 1992 Lincoln Town Car, NO HEAT
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Ya - the 4.6 is a pretty peppy engine and if new to this car don't be shocked to see over 20mpg out of it either on easy longer runs!
Do hit back when you find what is causing the heat issue for archives and I want to know for the next person anyway too,
T
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