Rapid Heat
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Tuned
Joined: Apr 2021
Posts: 388
Likes: 231
Rapid Heat
I’m interested to know everyone’s experience with the rapid heat option. We’ve had a couple of single digit mornings here now and I’m just not sure if it’s working or not. I certainly do not get any sort of instant heated air from the vents, but it’s not ice cold air either. Certainly nothing that I think would heat up my truck. What are your experiences?
Lead Driver
Joined: May 2021
Posts: 5,885
Likes: 3,512
From: Uh oh, CA
Laughing Gas
Joined: Aug 2008
Posts: 832
Likes: 110
Heated seats and steering wheel are noticed much faster. However, without the battery heater for a/c, the cab is cold forever on cold mornings - you define what cold is. Turning cab heat on recirc helps a lot but recirc does not work if you want defrost windshield. once the aux heat starts to warm the cab turn it off or you will fog up the windows especially if you have snow on your boots or floor mats.
Last edited by JohnD333; Jan 9, 2022 at 08:33 PM. Reason: Typo
Hotshot
Joined: Mar 2017
Posts: 10,172
Likes: 1,376
From: Chaz
Compared to my other diesels, in the 30s and 40s the rapid heat would get some luke warm air out pretty quick. Never gets much below that here.
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Mountain Pass
Joined: Feb 2015
Posts: 136
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I noticed it on mine the first morning i came out after getting the truck. Compared to my old 2011 6.7 it was significantly warmer in the cab after only running for a few minutes. There was so way the engine had any heat in it yet.
Cargo Master
Joined: Feb 2020
Posts: 2,277
Likes: 949
Rapid heat doesn't seem to do anything if you leave the climate control in auto. If you have CC in manual and crank the temp all the way you will get heat out of the vents almost instantly - well before the diesel heats up so it does work.
Mountain Pass
Joined: Jan 2021
Posts: 121
Likes: 36
I just picked up my 22 F350 6.7 with rapid heat and I think it heats quite quickly compared to my Yukon XL Temp in the low 30's. I just use the auto settings. If you've got remote start, use it to get a jump on it.
Laughing Gas
Joined: Oct 2017
Posts: 787
Likes: 73
From: Lansing MI
If my memory is correct, it is 150W provided by 3 50W relays in the panel. For comparison, a decent hair dryer is 1800W.
Heat the cabin, no. Its more to keep the fog of the windshield.
Heat the cabin, no. Its more to keep the fog of the windshield.
Lead Driver
Joined: May 2021
Posts: 5,885
Likes: 3,512
From: Uh oh, CA
I have seen others say it was 1500w.