blows no heat

Asked by Ram1500_2012 Dec 12, 2016 at 06:33 PM about the 2012 RAM 1500

Question type: Maintenance & Repair

My 2012 dodge ram 1500 is a base model truck.
The dealer ship has replaced my thermostat, cold
hot dial, and my heating core. In cold weather(-25C
or colder) it blows no heat. I turn the dial to front
instead of dash and it blows snow out on high
speeds.

28 Answers

101,985

After all that work, the dealer didn't confirm the repairs worked? Since they replaced the heater core, it should be safe to assume they ensured the blend door at least is working, but it sure reads like you have a problem with a mode door not working, maybe the recirc door? Did they touch the cabin filter at all?

26 people found this helpful.
150

I think maybe try a heater control calibration. Then all the doors and the heat will work together. Cause I know that duramax chevy and gmc if the batterys die the heat needs a recalibrate for a reason

15 people found this helpful.
440

My 2012 ram 1500 heat stoped working did this before and all I had to do was push the controls and it worked but I can’t remember what I did anyone know, it only happens when it gets real cold

44 people found this helpful.
2,300

Blower on low; hold air recirculation button in for 10 seconds, release; hold it in again until the recirc light flashes (about 10-15 seconds); release. It resets the stupid computer that has glitched. Found answer on another forum but don't have it here to post link.

230 people found this helpful.
360

Bobbie you're right! I tried the recirculate reset and it worked.

36 people found this helpful.
250

Thank you Bobbie your a lifesaver!!!! Froze my ass off all the way home from work about 30 miles at -6 degrees and was just about to order a thermostat. Luckily I decided to do a little research and found this forum. Went out held the button til it flashed and lol like magic hot air.

25 people found this helpful.
80

I just tryed but not resetting the controls are dead but blower works not recycling ac or heated mirrors

8 people found this helpful.
120

Bobbie for Prime Minister... It works for my dodge ram 1500 4.7l. Thanks

12 people found this helpful.
120

Yes Bobbie is right!!!! My heat start working instantly thank u I have a bighorn ram 2013 my light didn’t flash but u felt the heat instantly after the first ten seconds of holding the button

12 people found this helpful.
80

Kk did reset thing. All lights did as you said. I had my blower control out of heater box as it hit broken and I m j b big the pcs back together. The control got extremely hot extremely quickly. Is this normal

8 people found this helpful.
30

Bobbie you just saved me a pile of cash bud! Thanks for posting

3 people found this helpful.
40

Thanks Bobbie -25 in Saskatoon Canada froze my butt off till I got home and saw your post worked like a damn. Cheers.

4 people found this helpful.
80

What do you do if you don’t have a recirc button. I have a dial and sync/ac buttons only

8 people found this helpful.
70

Your recirc button is on the left knob. The little car with an arrow in the shape of a “C”.

7 people found this helpful.
30

Winnipeg currently -41c just happened to me, luckily tried the recirculation trick and it worked!!! Thanks guys

3 people found this helpful.
40

Thanks Bobby. It is minus 42 in red deer and it worked just as you said it would. You just saved me a pile of money. Love coming to these forums to find answers from knowledgeable people like yourself

4 people found this helpful.
250

I must be doing something wrong in the reset. truck on or off? how long between the 10 sec and the 15 sec holding. can't get it to flash

25 people found this helpful.
20

didnt have any results then I turned off the blower button then pushed on the button and turned on the blower and it worked Warm Air!!!

2 people found this helpful.
10

Hey Bobbie, right on my man your little trick worked for me and its -35 celcius in Ottawa

1 people found this helpful.
30

When I press the recirculation button, it immediately flashes 3 times. If I hold it in, nothing happens. I still don't have any heat and it's -30C in Kenora, Ontario!

3 people found this helpful.

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