# Heater provides poor heat

**URL:** <https://community.cartalk.com/t/heater-provides-poor-heat/43505>\
**Category:** Maintenance/Repairs\
**Tags:** heating, gmc, 2500\
**Created:** [January 30, 2010, 9:25pm UTC](https://community.cartalk.com/t/heater-provides-poor-heat/43505 "2010-01-30T21:25:00Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![DaveSullivan1942](https://avatars.discourse-cdn.com/v4/letter/d/f04885/32.png) [@DaveSullivan1942](https://community.cartalk.com/u/DaveSullivan1942)\
**Post date:** [January 30, 2010, 9:25pm UTC](https://community.cartalk.com/t/heater-provides-poor-heat/43505/1 "2010-01-30T21:25:00Z")

</div>

The temperature gauge on my 1989 GMC pickup never goes above 150 degrees, thus the heater provides poor heat. The thermostat has been changed four times with no perceptible result. The cooling system has been “burped” with each thermostat change.

---

<div class="post-metadata">

**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [January 30, 2010, 9:28pm UTC](https://community.cartalk.com/t/heater-provides-poor-heat/43505/2 "2010-01-30T21:28:02Z")

</div>

Has the fan clutch been tested for proper operation?

Tester