MacBook Pro idle CPU temperature fluctuations spikes after battery replacement
Hello, I have a macbook pro mid 2017 non touch bar with an Intel processor. It had a bad battery, so I let it replace it by an Apple authorized service provider. The battery is from SMP.
The battery is doing great, but there is something really annoying.
Before I brought my macbook pro to have its battery replaced, I had idle temperatures between 30-50°C when doing basic things on the mac like having simultaneously many browser tabs and pdf files open, and listening to music, etc...
Rarely the CPU temperature went upward above 70°C oder 75°C.
When I connected my macbook pro to my external monitor through thunderbolt 3 cable, the idle temperatures were between 50-60°C. But even then when connected to the external monitor when I performed tasks like converting audio files with xld while pdf files and safari browser tabs were open, rarely the temperature went above 75°C.
Now, after the replacement of the battery and after I did a clean install of Big Sur, the idle temperature, when it is not connected to my external monitor, starts in the range I mentioned above and then abruptly goes as high as 80°C when I am doing nothing or as soon as I am starting Safari or Preview and the cpu temperature goes up as high as 60° to 80°C. Sometimes it spikes immediately at start above 95°C.
That is really annoying. I see these temperature jumps of 20°C when I am doing literally doing nothing. It starts at between 30° and 40°C and "jumps" to 60°C then comes back in a second to between 40°C-50°C.
When it is connected to the external monitor the idle temperature is mostly between 60° and 70°C, then the temperature jumps, suddenly it goes as high as or 95°C or 105°C when connected to the external monitor and then goes down again after the fan has turned on. The temperature jumps reach more than 95°C when I am observing the TG Pro app to monitor the temperature.
Could it be that the guy who put the logic board on the new top case with the new battery could have had bent the heat sink or at least maybe he pushed on the heat sink and it messed up the old thermal paste? I am going to contact Apple soon. I wanted to know if someone had a similar issue and it that is maybe software related?
