Joined: Jul 2005

Posts: 174

Likes: 0

From: pa, usa

Hello everyone! First time poster looking for your help

First off is lucky enough to have a 99 Honda Accord EX v6 with 220k on her

- I have the automatic climate control feature. A couple weeks ago if it was set to 90 degrees I would have heat. If I dropped it below 90 I would lose heat.

- Now I have absolutely no heat.

- I have two hot hoses into the heater core but does not seem to be moving by the cable. I took the cable off and physically opened it myself and still no heat.

- no over heating or under heating for normal operational temp.


- vents seem to change when selecting. They might get stuck here and there.


Thanks for any help.

Joined: Jul 2005

Posts: 174

Likes: 0

From: pa, usa

I was shared a diagnostic test and here are results

D - short in the outside air temp sensor circuit
L - an open or short in the mode control motor corcuit
K - A problem in the air mix control linkage, door or motor


going to google now. Any of these in common?

Joined: Jul 2005

Posts: 174

Likes: 0

From: pa, usa

Given this information, what should my next steps be?