Hello! I understand your Ember temperature control isn't working anymore, and I’d love to help get this sorted for you. Just to clarify, is your Ember mug not heating at all, or is it failing to maintain the temperature you set? Also, are you using the Ember app for control, or relying on the mug's physical buttons?

In the meantime, a common and effective first step is to reset your Ember mug to factory settings. This often recalibrates the temperature control system and can resolve issues like this. You can do this by pressing and holding the power button on the bottom of the mug for about 15 seconds until the LED indicator blinks through colors (blue, yellow, then red). After resetting, try setting your desired temperature again.

If you've already tried this or if resetting doesn’t help, please let me know. We can then explore other options, like checking the charging base or app connectivity.