# 2007 Nissan Titan heater trouble

**URL:** <https://community.cartalk.com/t/2007-nissan-titan-heater-trouble/150782>\
**Category:** Maintenance/Repairs\
**Tags:** nissan, titan\
**Created:** [October 15, 2019, 3:28pm UTC](https://community.cartalk.com/t/2007-nissan-titan-heater-trouble/150782 "2019-10-15T15:28:41Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Wayne39](https://avatars.discourse-cdn.com/v4/letter/w/ecd19e/32.png) [@Wayne39](https://community.cartalk.com/u/Wayne39)\
**Post date:** [October 15, 2019, 3:28pm UTC](https://community.cartalk.com/t/2007-nissan-titan-heater-trouble/150782/1 "2019-10-15T15:28:42Z")

</div>

Heater doesn’t work. I replaced the heater water control valve under the hood on the firewall. When I turn the temp. control knob to the right I hear a buzzing noise that runs for about 15 seconds. When I turn the key off I hear the same buzzing sound if the knob is turned to heat. If the knob is turned to cold I don’t hear the buzzing when I turn off the key. The AC cold seems to works fine.

---

<div class="post-metadata">

**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [October 15, 2019, 5:46pm UTC](https://community.cartalk.com/t/2007-nissan-titan-heater-trouble/150782/2 "2019-10-15T17:46:26Z")

</div>

Probably the blend door. The buzzing noise is probably the actuator.