Bosch series 500 got E20 error

[carl_repair]

My GF's Bosch dishwasher (Model SHP65T55UC/07) keeps throwing the E20 error. After resetting, it just gives a faint couple of clicks and errors out again.
I've cleared the drain and looked inside, no leaks or burnt spots. The online wisdom says it's the circulation pump.

Before I buy the part, can I use the built in Test Mode to confirm the pump is shot?
What resistance reading should I be looking for on the pump motor with my multimeter? That impeller spins freely (zero resistance), which sounds bad

 

[vvictory45]

I got the same E20 on my Bosch and used Test Mode to see the pump wasn’t working. My meter showed zero ohms on the motor, so I changed it and it worked fine after that. Did you check if power is reaching the plug during Test Mode?

 

[bottomoftheocean]

Yeah, you can definitely use test mode to confirm before throwing money at it and on those bosch units, the circulation pump should read around 15 20 Ω across the motor windings, if you’re getting open or way off from that, it’s toast and you see the free spinning impeller with no resistance is another strong sign the windings are gone

 

[Alan]

My GF's Bosch dishwasher (Model SHP65T55UC/07) keeps throwing the E20 error. After resetting, it just gives a faint couple of clicks and errors out again.
I've cleared the drain and looked inside, no leaks or burnt spots. The online wisdom says it's the circulation pump.

Before I buy the part, can I use the built in Test Mode to confirm the pump is shot?
What resistance reading should I be looking for on the pump motor with my multimeter? That impeller spins freely (zero resistance), which sounds bad

Hello, imterested to know how you later went about this issue