That’s not what’s been observed with most of the Mach-E heater failures so far. Some of the elements start to intermittently fail open and the total output will be reduced at random times as I described before. Owners report little to no heat at times.
My heater turned on for the first time this season. It's 26 F outside. 27.35 % SOC
[/QUDid they measure the power (input) when they experienced their output (heat) reduction as I have done?
It might be that the PTC is failing but the symptoms do not point towards that and my local EV expert says PTC failures don’t present the sort of symptoms I experience.
I experience no “reduction” as such in total output (heat emission) or in the measured input (power).
Heat output is either totally and normally present or is totally absent. Similarly, power consumption input measured is either at full power or zero.
If there are numerous elements and one or some are failing, in their intermittent or terminally failed state I’d expect power input should reduce by the same proportion of working:failed elements as distinct from the symptoms my Stangy presents.
Seems almost as if there’s a fault with whatever programs or controls the power to, or the switching of, the PTC that has become reliant on the HVB SoC measure being above or below c35% or whatever such a SoC presents.
I’m booked in for a diag and that 12V battery system recall on 11th Dec. Be interesting to learn precisely what is causing this.
Yeah, looks like the way this is going, I think.
Will do
Bloody hope so, was frozen first time it failed which just so happened to be first night temps fell below freezing point, wifey refuses to go in car so every cloud has a silver lining
This is exactly what I’m experiencing. On occasion, I get full heating capacity like I have for 4 winters now, but usually I need to keep my fan speed very low (1-2 ) and the recirculating air set on to get any warmth out of the car. I was supposed to take it in today for diagnosing, but they (my dealerships service department) can’t look at it for a couple days (2-4) minimum, and I can’t be without a car that long right now.
My heater failed and did not stop the vehicle. No errors even, just no heat at all. Part replaced, all back to normal.
I heard from a top tech that stopping the car is only one possibility depending on circs. Sounds like we were both lucky in that respect.
