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Ryan Mlynski

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Joined
Jun 29, 2024
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Just bought a 2014 ffe about two months ago. Pretty happy with it so far. Been lucky enough to only have to drive it in nice weather. Curious what sort of range reductions people see when they have to use heat or ac and windows defroster. Any responses would be appreciated
 
To my knowledge, the way the Guess-O-Meter (range indicator) works, is when you turn on climate control, the new range displayed is what you would get if you keep the climate control on the whole time. The weather has been in the triple digits out here lately, and I see the range drop 40 miles on a full charge for my 2017 with the larger battery. 120 to 80. Thats one third. So for the smaller battery, I would think a drop of 1/3 would be about 78 to 53 miles?

As you consume battery, the mileage drop decreases, and I think that if you had AC on, that as the car cools down and uses the compressor less, then the mile drop would also decrease. Same if the ambient air wasn't as hot.
 
Another effect I've noticed is that if you start off on a fairly warm to hot day not using the A/C and then decide to turn it on, say for highway driving, that the reduction in range is less than expected. I've turned on the A/C in this circumstance and only seen about a 10-15 km reduction in range compared to 30-40.

Part of this may be due to the cabin not being as hot as it was sitting in the sun locked up, but I also believe that the A/C compressor may already be on to help with cooling the battery and motor, so the added load of cooling the cabin is not as great a difference.
 
If it’s in the 90s and my car has been plugged in for any reasonable amount of time, I can count on having NO a/c for the rest of the day. :-(
 
If it’s in the 90s and my car has been plugged in for any reasonable amount of time, I can count on having NO a/c for the rest of the day. :-(
That sounds like you have a full failure. This time of year I'll get in and have the battery heat soaked to 115F or more and still get AC in 10 to 15 min at most.

When my coolant diverter was broken, the battery would not cool at all, which would keep the AC locked to the chiller block instead of the cabin evaporator.
 
That sounds like you have a full failure. This time of year I'll get in and have the battery heat soaked to 115F or more and still get AC in 10 to 15 min at most.
This means that you have to wait until you get cool air? Mine always instantly blow cold.

I have poor 2014 23kwh FFE and i have installed heated front window, so i dont need to use blower heater in winter. Yes, it is cold to drive, but at least i get my range. I can not even think about turning on heater. We have cold winters in Lithuania (-4 farenheit at times).

On summer on the other hand i can always use A/C without significant range drops.
 
That sounds like you have a full failure. This time of year I'll get in and have the battery heat soaked to 115F or more and still get AC in 10 to 15 min at most.

When my coolant diverter was broken, the battery would not cool at all, which would keep the AC locked to the chiller block instead of the cabin evaporator.
Thanks. Yesterday it was pushing 100 degrees here. Because the car had not been plugged in overnight and was parked in the garage, I was able to use the a/c all day when I drove with no problems.

If my car had been in the garage but plugged in and charging, I would have had no a/c for the rest of the day’s.

Can you clarify what “full failure” means in your reply when my a/c works, just not after the vehicle has been plugged in and charging?
 
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