Question about 2004 Mercury Sable

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Temperature will not change when you set the temperature control from 60 to 90. I getting heat but not hot just warm. I have climate control on a 2004 Mercury Sable LS

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I've seen this before. There is heat mix solenoid just behind the stereo that moves the mix door to determine the air temperature at the vents. The solenoid has likely failed and needs to be replaced.

Posted on Nov 12, 2010


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1999 Chevrolet Cavalier A/C system.

Yes the blend door is what controls the air temperature at the register outlets. An example would be the temperature control is set to heat, but you only get cold air or slightly warm, then the blend door is not functioning correctly either due to the door actuator being defective or the blend door has become warped and is jammed, in most cases both are the problem. If you do have automatic climate control there can be a problem with the control module as well, but that is the rarer of the problems I have seen. This assumes the heater core is getting hot and it is not plugged.

Feb 21, 2017 | Chevrolet Cars & Trucks

1 Answer

I have a 95 Voyager with warm air at best when heat is cranked up. Changed the thermostat, heater control valve and flushed everything. What else could it be?

Climate Control A/C Heat Defrost Mode Actuator

this part has many names blend door actuator etc. It is car and car option "Climate Control" feature specific and located under the dash.

Before replacing confirm that the inlet and outlet heater hoses are both to hot to hold. The hoses connect at the fire wall on the van and if the return is not hot with setting to full heat than there is a restriction in the coolant path through the heater core.

The heater door actuator is the most likely culprit. If the air is bi passing the heater core it will be at best warm. Raising and lowering the temperature setting the movement of the door can be heard.

Hope this helps?

Nov 07, 2016 | Cars & Trucks

1 Answer

Heat temperature changes intermittently from warm to hot to warm. Is something sticking ?

could be you climate control working correctly to stop the cabin from getting too hot or too cold

Nov 22, 2015 | Cars & Trucks

3 Answers

1999 ford expedition , runs good doesn't overheat , but puts out no heat ?

heater core might need replaced . check the hoses going to it under the hood after it gets to operating temperature .One should be hot and the other not so much

Nov 19, 2015 | Ford Cars & Trucks

1 Answer

I replaced the heat blend actuator because I was not getting any heat. Now, after replacing, all I get is hot air and no cold. The A/C was working fine just before replacing.

Do you have Manual Climate Control System or Dual Automatic Temperature Control System ?
The temperature control switch:
  • is a potentiometer that outputs a variable voltage to the temperature blend door actuator to set the position of the temperature blend door.
  • initiates closing of the heater control valve. When set to full COOL, a lever on the temperature blend door pivot shaft depresses the pintle of the heater control valve vacuum switch. The heater control valve vacuum switch then applies vacuum to the heater control valve, closing off engine coolant flow to the heater core.
  • is serviced only with the climate control assembly.
You may have disturbed something when changing the actuator , the vacuum switch o vacuum hose .

Oct 21, 2015 | 2005 Ford Explorer XLT

1 Answer

Why doesn't my heating and cooling system come on when i start the car?

If this is a new problem, a temperature sensor may have gone bad. But if this is a new car to you, some Climate Control cars work this way.

Some will allow for Vent or Panel just to get air circulating, but the A/C should come on when you select A/C unless the outside temperature is too low.

For heater functions, the engine must warm up enough to provide heat. The Climate Control models will not turn on until it compares your temperature settings with how hot the engine water temperature is to provide this heat for you.

Now you may need to check the Antifreeze levels and check the temperature of the Radiator water to know if the Thermostat is working properly.

Oct 16, 2012 | 2001 Oldsmobile Intrigue

1 Answer

I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital...

I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital temperature on the climate control is not correct. When it states that it is below 30 degrees on the ext and it is warm outside the air wont be cold. Once it starts going above 30 degrees the air gets colder. Today the blower stop working all together. Was told it maybe the climate control unit was bad. You can hear the door opening/shutting when you switch the temp from cold to hot. But there was no heat blowing out whatsoever in the winter time. Could you please give me your opinion on whether or not it is the climate control unit or something else?

Jul 11, 2011 | 2000 Pontiac Grand Prix

2 Answers

WHen we use the auto car starter, it blows cold air, and a lot of it. Its nearing the winter here in New England and I need to know how to set up the starter to blow warm air. Any ideas?

Start the vehcle and let it warm up then set all the controls to heater? Then turn off the car. Use the remote start to start the vehicle and check the controls are still set to heat mode.

Oct 02, 2009 | 2007 Chevrolet Impala LS Sedan New Cars

2 Answers

1999 Lincoln Navigator Heating Problem

if the heater core is getting hot then the problem is the air temp control blend door actuator, a common problem.

Mar 13, 2009 | 1999 Lincoln Navigator

2 Answers

Heater won't get hot on 2005 dodge caravan

there could be an air lock in the system, pluged heator core, a bad thermostate or control modual. try bleeding the air out through the bleeder screew if there is no heat after that have the control modual tested if its okay try having the cooling system flushed then if it still doesnt heat intall new termostate

Oct 22, 2008 | 2000 Dodge Caravan

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