Need help location parts for repair of oil heater PCB, the first board appears to have a bad relay, HJR-3FF-S-H. The second board looks good other than the S3 TEMP/UP micro button switch that was damaged and no longer "clicks' back to the N.O. position. I don't have a part number for that one. First issue with the heater was getting bumped into a table leg that damaged the micro button switch, it still functioned but would not click back to the N.O. position. Second issue was when the heater was operating, an audible two clicks in tandem, a few seconds passed then the same two clicks again. The temp readings would change with those clicks, set temp reading and then back to room temp reading. Third issue was the heater not powering off when pressing the on/off button, the digital display would go dark but the heater would remain powered up. All I'm finding for the relay is 12VDC and don't know where to start on the micro button switch. Pic's attached, any help would be much appreciated. Thank you

 

I'm not expert by any means but I would replace Capacitor C3 and try if it changed anything, looks like it is bulging on top.
Those micro switches are common type and will be easy to find on Ali or Amazon for couple $, just measure the size.
This could be it https://www.amazon.com/QTEATAK-Momentary-Tactile-Button-Assortment/dp/B07VQF8P2Y?

 

I'm not expert by any means but I would replace Capacitor C3 and try if it changed anything, looks like it is bulging on top.
Those micro switches are common type and will be easy to find on Ali or Amazon for couple $, just measure the size.
This could be it https://www.amazon.com/QTEATAK-Momentary-Tactile-Button-Assortment/dp/B07VQF8P2Y?

I'll swap Capacitor C3 and get some micro switches on order, thanks for the info. What's your take on Relay KJ1? The backside of the board where KJ1 is mounted looks like it's been pretty hot and the top edge of the relay has a tiny window similar to a blown fuse indicator that appears darker in color than Relay KJ2. Will probably replace KJ1 as well if I can locate one, not having any luck there as all I'm finding is 12VDC.

 

There is nothing special about the relay and they are cheap, sure you can replace it while you are there

 

I'll swap Capacitor C3 and get some micro switches on order, thanks for the info. What's your take on Relay KJ1? The backside of the board where KJ1 is mounted looks like it's been pretty hot and the top edge of the relay has a tiny window similar to a blown fuse indicator that appears darker in color than Relay KJ2. Will probably replace KJ1 as well if I can locate one, not having any luck there as all I'm finding is 12VDC.

Good news, I did find the relay, It's a multi-pack but since I have four of these heaters, I'm ok with that. I've got everything on order and will post my results.