Heater not working??!!

[jonysho]

My heater is not working and I have checked my coolant levels, put in a new T-stat, and checked out the heater core. I also replaced the EATC unit. None of this worked. I can put the unit on 90 degrees and still no go. It blows semi-warm. I am wondering what else could be the problem?

A little help please. My SHO is a 92MTX if that means anything.

 

[stephen newberg]

You seem to have gotten this into the wrong area, since this if for Gen IIIs, but someone here could easily know the answer, with many of the Gen III owners having previously owned Gen I & IIs, so I will leave this posted. But you might want to post it again in the correct area to cover your car.

pax, smn

 

[Steve Dionne]

It sounds like the blend door actuator. It's in the dash which you can access from the passenger side. It's a motor that controls a door that blends the hot and cold air together. The motor has probably ceased working and is stuck so as to not to allow very much hot air through. I did mine about two months ago. Not that expensive but you need to be a bit of a contortionist to replace it.