Question about 1995 Lincoln Town Car

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Heater core and ac working @ same time

Heater core and ac working @ same time heat not working or ac compressor full freon ac not cold

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Chances are the climate control panel is bad. This is the panel that has the controls and display in the dash. You can probably pick up a used one that is far less exspensive than a new one.

Posted on Apr 28, 2010

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  • Lincoln Master
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They always are on at the same time, the air temperature control blend door controls the outlet temp. It is broken or the electric motor that moves it is boken or both are defective which is the usual case,.

Posted on Apr 28, 2010

  • dopeweed Jun 28, 2010

    how can this problem be fixed.

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Posted on Jan 02, 2017

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1 Answer

Fan blows air, but no heat or ac


May be your air modulator. Do you hear a clicking sound behind the dashboard?

Jan 04, 2014 | 2000 Lexus ES 300

1 Answer

I have a Grand Vitara Suzuki 2008. Aircondition stop generating cool air. what could be the reason. car has 14,000 km and since last check I have travelled 1000 km


AC dead. all the time? truly all times.
1: does the fan blow? full speed.
2: does AC work on a hot day and a cold started engine? y/n
3: did you check the freon pressure, with the cheap refill kit
that has a gauge with the kit and hose.
is the gunge reading zero?
4: you start engine, and open hood and look at the AC compressor.
is the fan belt to that compressor turning, or is the belt missing.
if turning is the AC pulley spinning, that is not just the pulley but the
compressor front part and its main shaft, are they spinning.?
if not the AC clutch is disengaged.
if disEngaged, that means the AC logic box, is not happy.
The AC logic box can shut down the AC for 4 or more reasons.
and to find that , I stop here.
the fsm shows the pins on the logic box to see with logic input is failing.
on my car, its:
1: A/C on , switch is off.
2: fan not on, or power to it dead, no fan the logic cuts the compressor so the core dont freeze up and crack.
3: engine overload
4: engine overheat.
5: freon pressure too high.
6: freon pressure too low.
7: too cold outside, so shuts down , has to be extreme cold, RTM.
at the least. all this logic functions, save fuel and save other parts
from damage. and huge costs.

that is it for today, one more unsolved.

Aug 05, 2013 | 2008 Suzuki Grand Vitara

2 Answers

What's your problem?I have a 1996 Chevrolet Suburban. The AC is blowing out hot air. I have had the truck for 6 years, every Summer its the same thing. The ac does not get cold, I take it to the m


To clarify - - if the truck has rear and heat, you have two heater cores and two evaporator cores. The evap cores carry the freon.
If the leak is in the evap core in the front, the price is probably right.

Jul 06, 2012 | 1999 Chevrolet Suburban

1 Answer

A/C and heating core


The leaking heater core won't keep the compressor from working.
You say the ac system is charged, but the compressor won't come on ??
The compressor has to run to charge the system, otherwise you will only get half a can of freon to go in. The system holds 3 or 4 cans when empty.
The low pressure switch has to be jumped to make the compressor run to take the first two cans of freon.

Jul 03, 2012 | Chevrolet Cars & Trucks

2 Answers

When ac is on heat comes out


The system may be under charged. Does the compressor kick on? The blend air door for the hot and cold may be stuck in the heat position. The tempature setting moves a blend air door between the heater core and the A/C evaporator.

Sep 16, 2011 | 2000 Mercury Grand Marquis

2 Answers

I have a 1998 Oldsmobile bravada....just put new radiator, water pump, thermostat, radiator cap on and fluids are full....when i turn heat on....the ac automatically keeps kickin on causing me to only get...


did you burp the system after you where done. The heater d-core is the highest place in the cooling system and will be the first to collect an air pocket. Running the vehicle at idle with the cap off will help purge the air out.

The a/c will turn on any time the mode switch is on defrost. When the heat selector is turned to hot the air will first go through the a/c evaporator core and then through the heater core. When the heat selector is turned to cold air will only go through the evap core. So regardless if the a/c compressor is on or not with the heat selector on hot it should blow hot air.

Did the heat work before you replaced the other parts?

If not than it is possible that the heater core is plugged. Especially if the coolant was really dirty before you started.

Oct 05, 2010 | 1998 Oldsmobile Bravada

1 Answer

1997 Nissan 4 cylinder truck AC works excellent throwing snowballs cold air, then it will blow hot air. Relay switch and clutch has been replaced....Did not fix problem!


sounds like compressor isn't working properly or heater vacuum is opening vent to heater core.try turning on ac and if it cuts on and off repeatedly every few seconds the freon level is not correct or high pressure switch may not be working make sure radiator fan comes on when ac is on.if all this is working properly check vacuum hoses to heater may be opening vent doors to heater.hope this helps

Aug 11, 2010 | 2005 Nissan Altima

2 Answers

No cold air


Turn the a/c on to high blow fan, select full cold, open the hood with the engine running, the compressor has a clutch attached to the front of it and runs off the a/c fan belt, it will unmistakebly cycle if the system is working properly, you will see it cycle on and off and you will also hear it clicking on and off each time it cycles.
I suggest you start with those tests first and if you see the compressor is not cycling you are probably in need for a recharge of 134a freon which you can do yourself.
First look at the a/c lines and try to locate the sight glass incorporated into one of the thin(high pressure lines)small glass site that is a about 1/4-3/8 inch in diameter, its purpose is to let you know if the system is full charged or if it is partially chrged by means of allowing you to see air bubbles passing through the sight glass only if the compressor is cycling/working, the parts stores all carry the low pressure feed hose attachments and the proper freon to install to bring your vehuicle up to the cold desired from your a/c vents.
Each can of 134a is one pound, the system empty holds 2 3/4 pounds, buy one can of freon + oil Charge and install, one can of freon + leak detector and install and one can of freon + sealer.
If you are over filling the system through the (LOW) side only the system has a check valve that will blow off the excess and will probably scare the heck out of you as well. Please do all work with the engine running, a/c on fulkl cold high fan and eye and hand protection.
The leak detector may take a few hours to show traces of a slow leak, usually it is a colored die that is set into the freon can and must travel throughout the system to find its way to the leak, if the system has a fast leak it will spew out rather quickly, and hopefully if it is a slow leak the can with the leak stop in it may be enough to seal the leak, giving you enough time to save up for the actual repair needed to fix the leak.
Remember to always charge through the low side(wider hose and fitting) as the high side can cause serious harm to you as its high pressures can enter the freon can and cause it to explode.
A loose a/c fan belt causing the problem will be easy to detect as it will really be loose and probably noisey (squealing)when the compressor is on, if so adjust and or replace belt.

Jun 05, 2010 | 1999 Chevrolet Blazer

2 Answers

All i get from my heater is heat i cant turn the ac on, and when i turn off the heater it still blows hot air


Sounds like a stuck heater core valve. Find heater core valve. Under hood, find the two heater core hoses going into firewall. One of the hoses has a valve. Operate temperature control (full heat, then full cold) check that valve changes position. If not either replace valve or control system failure. Also, when temperature control in cold position, one hose should feel hot and the other cold. Temp fix: disable valve to close no heat or on heat.

Jul 10, 2009 | 1998 Dodge Ram 1500 4WD

1 Answer

2002 pontiac grand prix gt AC only blows hot air compressor full of freon and clutch spinning good temp control actuators working corectly narrow ac tube at firewall very cold thicker ac tube at firewall...


i had same problem 2 years ago. the actuator door tube was snapped in half and i used acquarium tubing to splice together. The tube runs along the passenger front well well inside engine and meets under the battery carriage. I could not tell anything was wrong without removing the battery to get a closer look. works like a champ now.

Also: there is also an inline venturi filter that fits in the aluminum tubing on the compressor, it may be clogged. You will have to have the freon sucked out to replace the filter. Check back with me so I can help more if this doesnt solve your problem.

Jun 19, 2009 | 2002 Jeep Grand Cherokee

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