e-Heater not working when HVB SoC under c35%

[Teslaeata]

Anybody experienced this?

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[luckie]

Anybody experienced this?

Not sure there’s anyone who’s ever seen their big battery with a state of health score below 80% let alone that low.

 

[Billyk24]

If you mean "state of charge" then Mach Lee presented a write up in the past. In short, when cold weather arrives and your battery temperature drops, the vehicle will prioritize heating of the battery and not the cabin. The same thing can be shown on Car Scanner Pro App and an ORB 2 reader.

 

[Maquis]

If you mean SoC, I know mine has still worked below 20%.

I once reached single digits and was at 6% 2 miles from home. I knew I was going to make it OK and tried to turn the heat on. It would not switch on. It may depend on the outside temp as it will favor maintaining battery temp.

 

[Billyk24]

If you mean SoC, I know mine has still worked below 20%.

I once reached single digits and was at 6% 2 miles from home. I knew I was going to make it OK and tried to turn the heat on. It would not switch on. It may depend on the outside temp as it will favor maintaining battery temp.

"single digit" battery temperature or air? There is a difference.

 

[Mach-Lee]

The heater should still work down to something like 5% battery. I've had it that low and it still works. It starts liming the power around that point as the battery gets lower. But at 35% should be full heater power.

You might possibly have a heater failure.

 

[Teslaeata]

Not sure there’s anyone who’s ever seen their big battery with a state of health score below 80% let alone that low.

Apologies, yes, SoC not SoH

If it was SoH I’d be whinging about that not my heaters

 

[Teslaeata]

If you mean "state of charge" then Mach Lee presented a write up in the past. In short, when cold weather arrives and your battery temperature drops, the vehicle will prioritize heating of the battery and not the cabin. The same thing can be shown on Car Scanner Pro App and an ORB 2 reader.

Different issue.

This is a fault.

It’s nowhere near cold enough for this prioritisation.

Tests undertaken at same temperature, if under 30-35% SoC heater doesn’t work, if over it does.

 

[Teslaeata]

If you mean SoC, I know mine has still worked below 20%.

I once reached single digits and was at 6% 2 miles from home. I knew I was going to make it OK and tried to turn the heat on. It would not switch on. It may depend on the outside temp as it will favor maintaining battery temp.

Yes, in the past my heaters worked at all SoCs.

 

[Teslaeata]

The heater should still work down to something like 5% battery. I've had it that low and it still works. It starts liming the power around that point as the battery gets lower. But at 35% should be full heater power.

You might possibly have a heater failure.

Heater hasn’t failed.

When over 30-35% SoC heater works normally.

 

[Maquis]

"single digit" battery temperature or air? There is a difference.

I have no way to know the battery temp, but I doubt the car lets it get to single digits, if it can help it.

 

[Mach-Lee]

Heater hasn’t failed.

When over 30-35% SoC heater works normally.

Heater failures can be intermittent and partial. In other words, you might only get 2 kW one day, and 4 kW the next day, 1 kW, etc. Is it perhaps just coincidence that you were below 35% when the heater decided to act up? Because I've never observed that behavior. If it's truly repeatable below 35%, then it seems related to a failure and you should have your Ford dealer run diagnostics.

I don't think it's cold enough where you live to get a battery heating diversion on a 2021. That's only if it's like -20ºC outside.

 

[Teslaeata]

Heater failures can be intermittent and partial. In other words, you might only get 2 kW one day, and 4 kW the next day, 1 kW, etc. Is it perhaps just coincidence that you were below 35% when the heater decided to act up? Because I've never observed that behavior. If it's truly repeatable below 35%, then it seems related to a failure and you should have your Ford dealer run diagnostics.

I don't think it's cold enough where you live to get a battery heating diversion on a 2021. That's only if it's like -20ºC outside.

There’s no 2Kw or anything draw by heater one day & 4K the next, it’s 4kW over c35% SoH and 0kW under.

 

[Teslaeata]

Heater failures can be intermittent and partial. In other words, you might only get 2 kW one day, and 4 kW the next day, 1 kW, etc. Is it perhaps just coincidence that you were below 35% when the heater decided to act up? Because I've never observed that behavior. If it's truly repeatable below 35%, then it seems related to a failure and you should have your Ford dealer run diagnostics.

I don't think it's cold enough where you live to get a battery heating diversion on a 2021. That's only if it's like -20ºC outside.

I am told that PTC heaters don’t fail in an intermittent way, they usually lose isolation and stop the vehicle, apparently.

 

[sglewiswl]

My heater turned on for the first time this season. It's 26 F outside. 27.35 % SOC

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