# Van heater only works on high. Please help **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [December 11, 2018, 9:48pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672 "2018-12-11T21:48:20Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Erin\_Gervais](https://avatars.discourse-cdn.com/v4/letter/e/9de0a6/32.png) [@Erin\_Gervais](https://community.cartalk.com/u/Erin_Gervais)\ **Post date:** [December 11, 2018, 9:48pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672/1 "2018-12-11T21:48:20Z")
Hi. I just had the radiator and thermostat replaced on my 2001 Dodge Caravan and now my heater only blows air on high. Is this just coincidence or could this be related to the repair. ---
**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\ **Post date:** [December 11, 2018, 9:51pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672/2 "2018-12-11T21:51:16Z")
I suspect coincidence. You probably need a new blower resistor. When these fail, you only have high speed on the fan. ---
**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:** [December 11, 2018, 9:53pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672/3 "2018-12-11T21:53:59Z")
More than likely the blower motor module/resistor has failed. [https://www.rockauto.com/en/catalog/dodge,2001,caravan,3.3l+v6,1434722,heat+&+air+conditioning,blower+motor+control+module+/+resistor,6557](https://www.rockauto.com/en/catalog/dodge,2001,caravan,3.3l+v6,1434722,heat+&+air+conditioning,blower+motor+control+module+/+resistor,6557) The voltage for the low speeds for the blower motor pass thru this resistor. The voltage for the highest speed by-passes this resistor. Tester ---
**Author:** ![tcmichnorth](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tcmichnorth/32/25126_2.png) [@tcmichnorth](https://community.cartalk.com/u/tcmichnorth)\ **Post date:** [December 11, 2018, 10:11pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672/4 "2018-12-11T22:11:53Z")
Blower mudule is a common failure on these vehicles. ---
**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:** [December 12, 2018, 4:52pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672/5 "2018-12-12T16:52:10Z")
Just wanted to say thank you for this thread. Had been living with this problem for a while and just ignoring it. Replaced the resistor and Shazam. now have all 4 speeds, ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [December 12, 2018, 4:56pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672/6 "2018-12-12T16:56:11Z")
Good goin’. Thanks for getting back here with your results. ---
**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:** [December 12, 2018, 6:16pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672/7 "2018-12-12T18:16:19Z")
I wasn’t the OP, just this thread inspired me to replace mine. ---
**Author:** ![Erin\_Gervais](https://avatars.discourse-cdn.com/v4/letter/e/9de0a6/32.png) [@Erin\_Gervais](https://community.cartalk.com/u/Erin_Gervais)\ **Post date:** [December 14, 2018, 6:07pm UTC](https://community.cartalk.com/t/van-heater-only-works-on-high-please-help/130672/8 "2018-12-14T18:07:10Z")
Hey Good to know. Thank you