Posted Wed Jun 4, 2014, 5:51pm Subject: Re: KitchenAid Proline wiring help
We actually were able to run water through it with all 4 leads attached today, but we didn't wait more than 10 min. after turning it on. I will leave it on longer and see if we can get the temp up.
Janus' comments seem accurate. It's likely that water has gotten inside the heating element. This hasn't happened to me but it's been known to happen.
There are two U-shaped heating elements, one on each side of the boiler. If you put the ohm meter lead on the two top nubs of each U-shaped element you will read the resistance of the element; this should be between 20-40 ohms, if I remember correctly. If you put one lead end on the metal of the boiler and the other on one of the nubs you will measure the resistance between the element and the boiler; this should be near infinite.
If it were my machine, I'd measure the resistance as I described to have an idea of what's going on. Then, I'd turn it on with only the leads connected that don't result in popping the breaker. I'd leave it on like that for 24 hours. Then I'd turn it off, let it cool, then remeasure the resistances. If it makes a difference in the measurements I'd do it a couple of more times.
Then, it might be time to try the "turn it on until it pops" under close supervision to try and dry out the moisture in the heating element.
The water temperature will become higher once both heating elements are working properly. It's possible to use one heating element but it will take a much longer time to heat the machine. I think if you give it an hour to reach stable temperature it will likely be hot enough to brew a shot. If you wait 10-15 minutes between shots it's likely to recover sufficiently.
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