Cold or Hot knob issues.
Thread Starter
Registered!!
Joined: Mar 2012
Posts: 4
Likes: 0
Rep Power: 0 
Cold or Hot **** issues.
When you turn your heater **** from cold to hot, what happens? I hear a motor doing something behind the radio but i dont know what to call it. I know its like sliding something open and closed for cold air or hot air, but im having problems with mine.
When i turn the **** from cold to hot, the first 3 clicks always work but sometimes the motor stops closing (assuming) the air vent thing causing my car to blow cold air even though the **** is all the way on the hot end.
Sometimes the **** works perfect and i can hear the motor work after every click of the **** from cold to hot.
Car is a 2002 civic EX Sedan.
What could be going on and how can i fix it?
Sorry i can try to explain it better if needed but like i said i dont know what to call it.
When i turn the **** from cold to hot, the first 3 clicks always work but sometimes the motor stops closing (assuming) the air vent thing causing my car to blow cold air even though the **** is all the way on the hot end.
Sometimes the **** works perfect and i can hear the motor work after every click of the **** from cold to hot.
Car is a 2002 civic EX Sedan.
What could be going on and how can i fix it?
Sorry i can try to explain it better if needed but like i said i dont know what to call it.
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 517 
Re: Cold or Hot **** issues.
What you hear is the "temperature door actuator" or "blend door actuator", depending on what the door is called.
This catalog link just calls it a motor.
There are more actuators for the air mode and recirculate doors.
The actuator is comprised of a servo motor to do the work, and a position sensor for information feedback to the controller.
Since I can't diagnose it from here, my GUESS would be a faulty position sensor inside the actuator. I would replace the actuator if this was the case.
#14 is the temp door actuator here:
From: http://www.hondaautomotiveparts.com/...y5=HEATER+UNIT
It is simple to replace (like 3 screws, a linkage piece, and a wire connector), but in a darn awkward place to reach. Drivers end of the heater case.
HTH
This catalog link just calls it a motor.
There are more actuators for the air mode and recirculate doors.
The actuator is comprised of a servo motor to do the work, and a position sensor for information feedback to the controller.
Since I can't diagnose it from here, my GUESS would be a faulty position sensor inside the actuator. I would replace the actuator if this was the case.
#14 is the temp door actuator here:
From: http://www.hondaautomotiveparts.com/...y5=HEATER+UNIT
It is simple to replace (like 3 screws, a linkage piece, and a wire connector), but in a darn awkward place to reach. Drivers end of the heater case.
HTH
Thread Starter
Registered!!
Joined: Mar 2012
Posts: 4
Likes: 0
Rep Power: 0 Re: Cold or Hot **** issues.
What you hear is the "temperature door actuator" or "blend door actuator", depending on what the door is called.
This catalog link just calls it a motor.
There are more actuators for the air mode and recirculate doors.
The actuator is comprised of a servo motor to do the work, and a position sensor for information feedback to the controller.
Since I can't diagnose it from here, my GUESS would be a faulty position sensor inside the actuator. I would replace the actuator if this was the case.
#14 is the temp door actuator here:
From: http://www.hondaautomotiveparts.com/...y5=HEATER+UNIT
It is simple to replace (like 3 screws, a linkage piece, and a wire connector), but in a darn awkward place to reach. Drivers end of the heater case.
HTH
This catalog link just calls it a motor.
There are more actuators for the air mode and recirculate doors.
The actuator is comprised of a servo motor to do the work, and a position sensor for information feedback to the controller.
Since I can't diagnose it from here, my GUESS would be a faulty position sensor inside the actuator. I would replace the actuator if this was the case.
#14 is the temp door actuator here:
From: http://www.hondaautomotiveparts.com/...y5=HEATER+UNIT
It is simple to replace (like 3 screws, a linkage piece, and a wire connector), but in a darn awkward place to reach. Drivers end of the heater case.
HTH
You replied in my other post about where to get door clips and what not, so thanks for that too man.
Registered!!
Joined: May 2014
Posts: 1
Likes: 0
Rep Power: 0 Re: Cold or Hot **** issues.
I had a problem trying to switch the temp control **** from Hot to Cold.Just spent all day farting around with my temp mix system on the Civic. It was a REAL ballgame replacing the blend mix motor (pd. $70 @ Gary's for one out of a 2002 Civic Junker). Anyway, that wasn't my problem. So I crawled back up in there and finally located the mechanism that controls the heater box flap/door and gave one of the plastic arms a push with my thumb. It snapped and freed up!!! Thought I might have broken it. NOW I HAVE COOL, AIR AND HOT!!! I win!
Carbone Honda diagnosed a "stuck heater door and blend mix motor" and would replace those two items for $1173 using new parts and 6 hrs. labor ($77/hr.) and I was going to pay some kid down at Gary's $400 to put the replacement blend mix motor!
Carbone Honda diagnosed a "stuck heater door and blend mix motor" and would replace those two items for $1173 using new parts and 6 hrs. labor ($77/hr.) and I was going to pay some kid down at Gary's $400 to put the replacement blend mix motor!
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
mrohitredd
Mechanical Problems/Vehicle Issues and Fix-it Forum
40
Sep 9, 2017 12:03 PM
mjdiaz89
Mechanical Problems/Vehicle Issues and Fix-it Forum
14
Jun 21, 2016 09:26 PM
liagreenhalgh92
Mechanical Problems/Vehicle Issues and Fix-it Forum
6
Jul 21, 2015 01:31 PM
NoobyKid
1st - 5th Generation Civic 1973 - 1995
4
Jul 13, 2015 07:53 AM
