I have a 2005 ford explorer. My heater has seemed

If your a/c is cooling at all...
you need to NOT check refrigerant
levels ANYMORE... Every-time you do that
you are venting it... out (creating other issues)... STOP.

YOUR description is indicating
blend-door actuator issues...

Parts are available... You will need to get
into your DASH to find which actuator is failing


Then BUY the parts below... (not expensive)
http://www.rockauto.com/en/catalog/ford,2005,explorer,4.6l+v8,1430690,heat+&+air+conditioning,heater+blend+door+actuator,10721

Click on the "INFO" button of each to see how they differ
and their applications...

Example:
hot/cold blend door...
More Information for FOUR SEASONS 37535

Real FACTORY+WORKSHOP+REPAIR manuals
will actually show you the BEST/FASTEST way to
open up your dash to test, repair or replace these parts.

Check out eBay or the internet
for REAL FACTORY repair manuals (example)

2005 Ford Explorer Shop Service Repair Manual XLS XLT Eddie Bauer Limited...

Hope this helps

Carnac the Magnificent

Two different problems. First check that your engine coolant is at the proper level and if it is there is a problem with the heater core blend door.

The temp door actuator motor has went out ,it is behind the glove box,on top of the blower box,toward the center of the vehicle.

jtg

Try swappingt the heater seat switch from the passanger side switch to see if thats the problem.

you may have abad hot /cold blend door acuator.its bolted to air box. also make sure both heater hoses going to heater core are hot,if only one is hot and the other is luke warm or cold then you may have a clogged heater core,remove hoses (@ core) and flush with water hose go both ways a couple of times. good luck hope this helps.

if the heater hoses going in and out of the heater core are hot, then your temp blend door is not moving to allow heat from the heater core into the car. either the temp knob or blend door motor is bad. some are vacuum, some are electric.

if the colng system has ever been opened;thermostat,water pump or any other cooling system repair,the bleeding process may not have been performed and you may have trapped air in the system causing your problem.This is a normal problem that can be easilly fixed by a qualified tech.

thats a hell of an answer from a dealer. and i wouldn't except it. tell them to fix it or you'll report them to better buisness bureau. as for their FIX. it's a joke. obviously a damper problem. good luck.

The blend door (mode door ) is a very common issue there is even an associated TSB t(technical service bulletin) it has to do with the blend door becoming warped and binding the accuator. In an opened or semi-closed position