How does cabin heating work?

[jjupi91897]

Bingo.

I can't wait for the winter discussions of heat pump vs no heat pump trucks. Our 2022 heats great. I believe heat pump owners will not be happy with what I expect to be:

- slower heat
- noisier heat
- vibration

Yes, my 2023 Lightning's heat works great also.

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[tls]

What I want to do is simply defog the windshield, which requires dry air. In other words, compressor should be on. Doesn't matter at all which vents the air is coming out of, as long as it's conditioned air.

No. When a heat pump is *heating* the conditioned space, no condensation and thus no dehumidification happens at the air handler coils. It happens *outside* where the air is being cooled to extract heat for the conditioned space. That's why low temperature heat pumps require condensate pan heaters at the outdoor unit.

 

[tls]

Yes, have to use the A/C button to provide conditioned, dry air into the cabin for defogging. Works great, even on the Lightning.

I guess my main point is that it seems that on my '25 Flash, the "Auto" setting does not use the A/C automatically when there is moisture in the cabin and fog on the inside of the windshield. To me this seems very odd, and it's the first vehicle (out of 30+) that I've had that behaves this way. I guess this winter I'll just turn "Auto" off and use the controls manually.

My gripe with "Auto" on both our Lightning and our Mach Es is that it puts no air to the back seat, so in a full car the back seat passenger roasts or freezes. Someone made some dumb choices about this stuff at Ford.

Heat on the heat-pump Mach E seems to work just as well as on the older one. Unlike the F150, the heat pump Mach E loses pretty much the whole frunk, which is unforthnate.

 

[Firn]

Not pointing fingers at any one person, fact of the matter is there are people complaining and it's almost comical.

FYI: I put a shorter antenna on both my trucks, not for clearance issues. Aesthetic reasons.

Stop trying to gaslight the conversation. Nobody here has complained about it, they have however identified that there IS increased noise and that it IS noticeable.

I don't think I've ever had to turn the heat up on the truck past 72, even on the coldest nights.

Fwiw the truck will more or less auto scale the power required to keep it at 72, up to as much power as the system can handle. Turning the heat up won't really give anything more.

 

[Rip]

Yes, my 2023 Lightning's heat works great also.

I only have experience with my '24, but I haven't had any of those (slow heat, noise or vibration), and I drove it all through a Maine winter. It worked fine.

 

[Vulnox]

I didn't have a pre-Heat Pump Lightning, but so far it's working great. I have been going into the office since Ford did their RTO moves and usually drive in around 5:30AM. I am in Michigan and we have had some 30-40 degree mornings and the truck has been warm and window fog free for the most part, some of the side windows are a little foggy but that was the case with my ICE F-150s as well around this time.

We did have a pre-heat pump Mach-e and the heat worked well on it, but I haven't noticed it work any less with our 2025 heat pump Mach-e in the same conditions.

When taking one of the kids to the bus stop I do think I heard the heat pump going though, it is a bit louder than I expected, but I only heard it while stationary. I have never heard it when driving in to work.

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