Heater on 1997 Mercury Mountaineer

My heater was working wonderfully well. Unfortunately last week, all of a sudden, there is no heat, no defrost, nothing. It's now below freezing where I live. Checked the water pump, radiator both replaced within 2 1/2 months. Not running hot .... any suggestions?

by in Richmond, VA on January 24, 2011
1 answer 3 comments
ANSWER by on January 24, 2011
The blower doesn't even turn on? Do you have digital temperature control (EATC) or manual knobs?
COMMENT by on January 25, 2011
Everything works well -- turn the knobs, they work. The air is blowing out . just no warm temperature. They are manual knobs.
COMMENT by on January 25, 2011
OK. Make sure your heater hose going in and the one coming out of your heater core are very hot when the engine is warm. If they are, then it's a temperature control issue inside the vehicle - the temperature blend door actuator perhaps. If the heater hoses to the heater core are not very hot, you could have a thermostat issue for example.
COMMENT by on March 01, 2014
Hi, My blowers aren't working in the front of the mountaineer at all; not even defrosters. However my heat does pump out of the vents but that also takes about a half hour of driving on the regular streets or 15 mins on the highway. What's wrong and how much would it cost me? Please get back to me ASAP. It's really cold and I have a little one. Thank you
Related Items:
A failed heater blend door or actuator can cause the temperature control for the HVAC system to stop working....
...use that regularly sneaks its way inside and I've noticed "evidence" of it being in/around the heater blower and vents, not sure if this has anything to do with my issue but I figured it may have...
Pep Boys gave me an estimate of $2601.88 to fix my heater and window. They said 8 hours of lab...
what else can be wrong. air comes out and the ac works just not the heater. could it be the heater core.

Related Content