# Ranger heater problem

**URL:** <https://community.cartalk.com/t/ranger-heater-problem/22683>\
**Category:** Maintenance/Repairs\
**Created:** [November 29, 2008, 4:28pm UTC](https://community.cartalk.com/t/ranger-heater-problem/22683 "2008-11-29T16:28:27Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![bull.durham](https://avatars.discourse-cdn.com/v4/letter/b/c89c15/32.png) [@bull.durham](https://community.cartalk.com/u/bull.durham)\
**Post date:** [November 29, 2008, 4:28pm UTC](https://community.cartalk.com/t/ranger-heater-problem/22683/1 "2008-11-29T16:28:27Z")

</div>

I have a 94 Ranger 6 cy 3.0 liter that only gives heat when it wants to. I have tried more than once to burp the system but no luck. The idiot gage does the windshiled wiper thing, up and down, up and down. When this happens on the high side I get heat, on the low it gets cold. Any help out there?

---

<div class="post-metadata">

**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [November 29, 2008, 4:33pm UTC](https://community.cartalk.com/t/ranger-heater-problem/22683/2 "2008-11-29T16:33:25Z")

</div>

How old is the thermostat? The engine temperature should not fluctuate. Once the engine reaches operating temperature it should stay there. Try a new thermostat and radiator cap.

Is the cooling system completely full and free of air?