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I am now struggling with an intermitent water leak into the base. After I replaced the heat pump all I left the front lower inspection panel off so i could check & after 5 or so cycles it was bone dry, including the polystrene floating disc section. Then randomly one day a big puddle appeared in front of the machine & I found an inch of water in the base. Dried it all out then spent an hour and a half lying on my front looking in whilst it ran through a cycle – not even a drip.
Any ideas what is happening?The supplier is replacing the pump.
You mentioned other reasons a pump may fail – are there any tests that can be done before fitting the new pump as I don’t want another failure.
The original pump worked for 7 years, the replacement worked perfectly pretty much daily for 5 weeks including Christmas so I imagine the rest of the machine is all okay.
The area where the pump fits was clean & dry & the pump was unmarked. But no ohm reading across the red contacts at all5 weeks after fitting the genuine Bosch/Neff
replacement heat pump the machine has E09 showing again.
Is it likely that the new pump has failed already or could it be something else?Just fitted a genuine heat pump & all seems well. Interrupted a cycle after 30mins to clouds of steam & hot water.
Thank you for your helpThanks Dave & Kaibart.
I think I best return this pump & buy genuine 00651956
i will let you know how I get on.Thank you
The old pump doesn’t seem to register any resistance between the red wires, does that mean it’s bust?
I will have to take the new pump off & test it as well.
An earlier reply seemed to suggest that I have been supplied the wrong pump although it states 00651956 as it also states 1209637, 12014980 & 755078 and these are may be not the same.I’m no sparky, setting my meter on 200 ohms I’m getting no reading on the side connections of the old heat pump.
Theres no model number on the door but on Neffs website the 651956 is the correct pump for all variants of the S51M53X1GBNo, I didn’t check the old, mainly because so many people reporting online that they only last a short time.
I have a multi meter – how do i check the old unit?
Thanks for your helphttps://www.ebay.co.uk/itm/115448511067
It says Manufacturers part number 651956 in the listing. I’d been on Neffs website & it said that was the pump for my machine so that’s why i ordered it.
It looks like i can send it back at my postage cost.
I’m at work today so can’t check the door but from memory i think that sticker has worn away as i got the model number off the back of the machine
