# Heat/Defrost door **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [September 28, 2013, 2:41am UTC](https://community.cartalk.com/t/heat-defrost-door/81542 "2013-09-28T02:41:33Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [September 28, 2013, 2:41am UTC](https://community.cartalk.com/t/heat-defrost-door/81542/1 "2013-09-28T02:41:33Z")
The door in the dash wont go to defrost. It just quit today. I assume its vacuum controlled. What do i need to do to fix it? I thought about pulling the dash vent where i can reach in there n have a look but it doesnt want to come out 92 Toyota Camry ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 28, 2013, 3:53am UTC](https://community.cartalk.com/t/heat-defrost-door/81542/2 "2013-09-28T03:53:08Z")
The HVAC doors are operated by a servomotor on the left side of the HVAC unit, look above the gas pedal. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [September 28, 2013, 4:03am UTC](https://community.cartalk.com/t/heat-defrost-door/81542/3 "2013-09-28T04:03:23Z")
I checked all vacuum lines and found nothing. Heat blows out every port except defrost. I can here the door move… ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [September 28, 2013, 4:07am UTC](https://community.cartalk.com/t/heat-defrost-door/81542/4 "2013-09-28T04:07:45Z")
Ok. Above the gas pedal is a box with a electric plug in with half dozen of so wires , would this be it? I could post a picture of it ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [September 28, 2013, 4:12am UTC](https://community.cartalk.com/t/heat-defrost-door/81542/5 "2013-09-28T04:12:07Z")
I unplugged it started car and nothing changed There is another on firewall just above and to the right of gas pedal with heavier gauge wires ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 28, 2013, 4:32am UTC](https://community.cartalk.com/t/heat-defrost-door/81542/6 "2013-09-28T04:32:49Z")
The servomotor connector has 7 wires. After the servomotor is removed you can test the mechanical operation of the door linkage. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [September 28, 2013, 4:40am UTC](https://community.cartalk.com/t/heat-defrost-door/81542/7 "2013-09-28T04:40:13Z")
ok. sounds good. Will do and send report Thanks ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [September 28, 2013, 7:19am UTC](https://community.cartalk.com/t/heat-defrost-door/81542/8 "2013-09-28T07:19:55Z")
Ok I could not find access to the door so i found the linkage by sticking my head under there and hitting the buttons for floor, defrost ect. Watched everything move and wiggled things around and defrost started working. 175000 miles i would guess its getting tired but its working again so all is good. It must have just been hung up. Thanks for the advice. I might not have found it without the help Thanks Again