heater control

I have this IC on this board thats from panel heater that works with Tuya Smart... Tried searching online the marking, nothing came up... Heater is gorenje Optiheat 2000 ewp... and it stopped working. control panel is not turning on... So im trying to fix it... Thank you!

I am a newbie. On one of my machines has a siemens Statotherm heater controller that has gone bad. Its function is to intermittently on and off a contactor that supplies power to a heater. There is a dial to control on off time or heat. There is no input feedback. What type of controller is it...

Hi everyone, I am replacing a caravan propane heater which was a duct heater. I have gotten rid of gas and so now need to replace with something like this and a fan: https://www.ebay.co.uk/itm/113870595604 Only problem is that the heater does not have a connection for the thermostat like it...

Have this schematic for a Heater Control. Please direct me to an explanation for (R1 + C1/C2) and (R2 + C3). I cannot find any online papers about how to implement phase-angle control. I can only find lots of explanations as to what it is. Specifically, I want to know how would I modify them...