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Tesla wall connector gen3 overheating fix

njhtran

Member
Jun 11, 2020
363
128
Temecula
Just thought I’d put this here in case someone else runs into the issue with the latest gen 3 wall charger overheating (3 blinking red light) at 48amps.

I called support and they had to force push a firmware update and that appeared to resolve the issue.
 

njhtran

Member
Jun 11, 2020
363
128
Temecula
I called the main Tesla phone number and chose option 3 (I think) for home charging support. The how - I simply mentioned the 3 red lights and they seemed to know the cause was firmware right away and the procedure to fix it. You just have to make sure your charger is setup for WiFi.

fwiw, prior to getting the firmware fix I was able to get a charge by dropping down the charge to only 35 amps to avoid overheating.
 
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Jewced

New Member
Jun 22, 2020
4
1
Gilbert
Ok, thank you for the reply. So this is a known issue then? I will call tomorrow and yeah the charger is connected via WiFi. I can change the amps via connecting to the charger then.
 

njhtran

Member
Jun 11, 2020
363
128
Temecula
You can also change the amps via the charging interface in your vehicle. Either method will help you get by until they push the firmware fix to the charger.
 
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bhorn

Member
Apr 10, 2020
155
157
AL Gulf Coast
What was the original firmware version and which one did they push?
I'm currently on 0.8.52 (car has 2020.20.5) and haven't had any issues.
Just for reference, here is the info from mine:

Device Summary

Firmware Version

0.8.52+g48bbab2b0de6be

Part Number

1457768-01-F

Not sure if I've received an update yet, but I'm not having any charging issues.
 
  • Helpful
Reactions: dhrivnak

Jewced

New Member
Jun 22, 2020
4
1
Gilbert
Update: contacted Tesla to verify if my firmware is current to which they stated I do have the latest firmware. I’ve come to the conclusion being that I live in Arizona my garage is pretty hot so I would assume that was the issue.
 

njhtran

Member
Jun 11, 2020
363
128
Temecula
Sorry to hear that. You'
Update: contacted Tesla to verify if my firmware is current to which they stated I do have the latest firmware. I’ve come to the conclusion being that I live in Arizona my garage is pretty hot so I would assume that was the issue.

Sorry to hear that firmware didn't fix it for you. Did they offer any other suggestions?
 

Jewced

New Member
Jun 22, 2020
4
1
Gilbert
Final update: the first time I just online chatted with Tesla and totally revived wrong information finally called the number explained the issue and was told this is a known issue with Gen 3 overheating and a firmware update was pushed out 2 weeks ago. Turns out my Gen 3 did not have the latest firmware and they pushed it through today so I shouldn’t have anymore issues hopefully.
 
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jeffnhelen

Member
Nov 10, 2018
26
10
Texas
Interesting to see this as I am having reduced charging issues with my Gen2 plug-in HPWC. They told me the thermal issue is a common issue with the plug-in ones and I could either get a Gen3 hardwired or the Corded Mobile Connector as a replacement. I’m leaning towards the Gen3 for 48A vs 40A charging on the CMC and ability to power share since we are entertaining another Tesla in the garage. Hopefully this is a permanent fix since I don’t want to upgrade and still have issues.
 

Voit

Member
Jun 3, 2020
6
3
Freeport, Maine
This firmware update has definitely cured my charging problem and the overheat error... I ran the car down to 50 mi of range and it recharged completely without any errors or interruptions.
 
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AmokTime

Member
Nov 27, 2019
207
221
Philly metro
My Gen3 has not had overheating yet, but it is still pretty cool in my garage (70F for upper 80s outside). The only overheating was the breaker, caused by the charger not being set up properly.

Mine was installed on a 50-amp breaker with #8 cable despite my having asked for 60 amp breaker and whatever cable gauge was necessary. The electrician, who allegedly installs Tesla wall chargers regularly (probably Gen 2s, though, which have switches for the breaker size settings), did not configure the charger for the smaller breaker size. The default config is apparently for 60 amp breaker. We have 2 M3SR+ cars (32 amp max draw), so we would never have noticed the difference. Then our daughter visited with her MX. About an hour after her arrival I started to wonder if the charger had been configured and asked, “Hey, how many amps are you pulling?” She checked her phone and responded, “48.” “Uh-oh” I went to the breaker panel and found the 50-amp breaker too warm. I had her throttle her charge current to 40 amps and used my phone to configure the charger that night.

If you get a Gen 3 charger installed on a breaker smaller than 60 amps, make sure you configure it or a MX, MS, or M3/Y LR or P might pop your breaker.
 

njhtran

Member
Jun 11, 2020
363
128
Temecula
Has anyone had this problem come back? Suddenly today mine is doing it again (red light blinks 3 times) and login to wifi interface shows an alert the system overheated.

Firmware Version

0.8.54+g46f395de1d5760
 

KrisHM3

New Member
Oct 12, 2018
1
0
Ellicott City, MD
Ours just started this evening out of nowhere. My husband is an electrician so he checked wiring and cables, everything looks fine. The HPWC is not getting an internet signal for whatever reason (we're fully configured and setup to connect to home WiFi) either and coincidentally neither of us can log into our Tesla apps. So annoying. Will be calling support tomorrow.
 

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