1998 Mark VIII heater box

[tmrbiker]

My temperture control doesn't work and the dealer said the "heater box" was the problem. Is this the whole heater case? There must be a better way. Anyone out there have a suggestion on what else could be the problem?

Tom

 

[1wykdmk8]

It maybe the 'blend door' problem that the 1997-1998 Marks have. Try the search function and type in blend door, you will be surprised how much info there is on it here. :Beer

 

[tmrbiker]

Thanks :give

 

[jdforsberg]

My 98 LSC had the same problem. $500. at the dealer. Has to drop the dash.

 

[formerknown]

Run a self-test code first:

http://www.p71interceptor.com/eatcswap/selftest.html