Nklem
Well-Known Member
- First Name
- Norm
- Joined
- May 20, 2021
- Threads
- 105
- Messages
- 1,318
- Reaction score
- 1,688
- Location
- Coast of Maine
- Vehicles
- Subaru Solterra
- Occupation
- Mechanical Engineer
Got it. So we see cabin preconditioning happening. I found another picture of your data with HVB temp in it and noticed what I've seen where it preconditions the pack to 10ºC. Then it will do everything it can to maintain that temperature even while driving.
I believe it is a software/too small heater issue. The heater runs the entire time. If valves weren't opening you'd see the power go down when the coolant got too hot. It never goes down.
It seems like 6kW should be enough to actually heat the battery pack though so it is a little confusing how the temp goes down but heater is running full blast. Keep us posted! I'm hoping something is actually broken but after seeing something similar happen to me at only -15ºC I'm thinking this is a software design issue/too small heater issue...
5-6 KW should be enough to heat the car. That is 17,000-20,472 BTUH. That is more than the 1200 SF 1st floor of my house at -15F. Car Heating is 4-5 Air Changes per Minute (about 500 CFM).
That is enough heat for a temperature rise of 31F-37.9F degrees to interior for air passed through the heater core. I believe there is something incorrect in programming, damper or a valve etc.
It could be the recirc damper is stuck 100% closed and forcing all air in from the outside and once through the car. With that issue, you will only get -15+37.9 or 23F degree air all the time. This is inline with what a youtuber in MN posted at -27F ambient temperature, he got like 10F air out of the vents. In normal workings and my car, I have heated to 68-70F from dead cold -5F (-20C) in 15-20 mins.
If anyone has in writing that Ford says this is the best you will get, please publish it. That is grounds for a Design Defect and Lemon Law buyback or a Recall on all Mach E's in the Northern States.
I only have experience down to -5F (-20C) where my car heats fine. I do feel something is not working correctly on some of these cars and needs to be repaired or programmed by Ford.
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