Need help troubleshooting a distiller electronics fault

[JCINAZ]

I am a beginner in electronics. I know a few basics. I have a multimeter that I set to 200 Vac for testing.

I have a distiller I have been using for 10+ years now and recently it stopped working. I am trying to determine where the fault is so I can replace the part. The company that made the distiller went out of business years ago, so I can't call them for support.

What isn't working is:
Heating element isn't starting.
Fan isn't spinning.
The boiler tank floater switch is working as water flows in when it drops.
There is a floater in the holding tank that appears to be working as, when I move it the relay clicks on/off.


I believe the issue is either with one of the switches, Mainpower/Fan/Water or the relay?

Here is what I confirmed:
- It's getting power from wall, as lights are on and certain components work.
- Upper Switch Heater Control is getting 120v
- Lower Switch Water Control is getting 120v
- When I test power on the reset switch, between 2 & 1 or 4 & 3 I get 0 volts. Which I am assuming I should get 120v on each? So an upstream fault?

I am looking for guidance on what components to test and how. Any help would be appreciated.

[fzabkar]

Use mains Neutral as your 0V reference for your DMM.

Pins B & C of the main power switch should both be 120VAC.

Pins 1 & 2 of the reset switch should both be 120VAC.

Pins C & NC of the Upper Switch Heater Control should both be 120VAC.

Pins B & C of the fan switch should both be 120VAC.

The voltage between pins A & B of the heater should be 120VAC.

The voltage between pins 23 & 24 of the fan should be 120VAC.

[JCINAZ]

Thank you for the help. Turns out when I went back to start troubleshooting it, it started working again. I am sure it will stop working sometime soon.

Regarding this statement:
Use mains Neutral as your 0V reference for your DMM.

I believe what you mean by this statement is to take one probe and attach it to the neutral line when testing the different components. The only question I have is on the diagram which label would be "Neutral"?

[fzabkar]

Neutral is the white wire in the power cord. Black is active.