Solved
Zanussi
Z816WT85BI

Zanussi Z816WT85BI won't complete a load

JOJohndusty
Asked over 4 years ago 2,868 views
0

Sorry if this seems long winded...

We have had this machine for nearly 3 years now. However it is in almost constant use with nearly 3 year old twins in the house!

This week, it seems to have packed in... When putting on a load, it performs the wash cycle, however it stops when time to drain and spin but doesn't display any errors.

The machine drains but no spin occurs.

We called an engineer to inspect and he thought I was being silly: "make sure you don't have any clothes caught in the seal" (we never had that issue). He then ran a service and diagnostic but found no issues as the machine filled up as needed, drained and spun slowly and quickly when empty, etc.

I'd cleaned the filters myself prior to the engineer's arrival and ran a cleaning cycle as there is a foul smell from the machine (possibly due to the rotting lint).

Once the engineer had left, I attempted to put a load on to spin/drain and the machine now stops at 14 mins remaining of the 16 minute cycle. No error messages are displayed.

Called the engineer back who said that the fault might be with the 'PCB'. He advised to un-plug the machine for 30 minutes to cause a reset and try again but that the part would need replacement or replace the whole machine.

Is there anyone with similar experience?

Solution Summary

AI-generated from this discussion

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Zanussi Z816WT85BI stops spin cycle and resets to 14 minutes

The problem
A Zanussi Z816WT85BI, around three years old and in heavy use, would wash and drain but would not complete the drain/spin stage with laundry in the machine. No error code was shown. After an attempted wash/dry cycle failed, a separate spin cycle started at 16 minutes, reached high speed, then slowed, stopped, reset to 14 minutes and unlocked the door.
Likely cause
The discussion suggests a control fault may be possible, with the visiting engineer mentioning the PCB as a possible cause. However, this was not confirmed. The accepted forum reply also indicated that faults can appear only under load, but no exact failed component was identified.
What fixed it
The only action specifically advised was to unplug the machine for 30 minutes to try a reset. The engineer said the PCB might need replacement or the machine might need replacing, but no repair was confirmed in the thread. Further diagnosis should be carried out by a suitably qualified appliance engineer.
Checks to try
  • Filter cleaned by the owner
  • Cleaning cycle run due to bad smell
  • Engineer ran service/diagnostic checks
  • Machine was observed to fill, drain and spin slowly and quickly when empty
  • Spin cycle observed starting at 16 minutes, reaching high speed, then stopping and resetting to 14 minutes
  • No error messages displayed
Parts or tools mentioned
  • PCB

Safety: Further diagnosis should be carried out by a suitably qualified appliance engineer.

Cause identifiedGenerated 16 Aug 2026 · AI summaries can make mistakes — read the full thread below.
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6 Answers

Accepted Answer
0
WH
WhitegoodshelpVerified Engineer
Answered over 4 years ago

Hi. one of my pet hates is when engineers test washing machines with no laundry inside. Lots of faults only occur when fully loaded. When it drains the water at the end of the cycle just before spin does the drum turn at all once all the water has gone? You can hear when all the water has gone when the noise of the pump changes and it starts "slurping".

Whitegoods Help — appliance repair expert and forum host.
0
JO
Johndusty
Answered over 4 years ago
0
WH
WhitegoodshelpVerified Engineer
Answered over 4 years ago

Hello John. Does it normally make that horrible humming noise?

Whitegoods Help — appliance repair expert and forum host.
0
JO
Johndusty
Answered over 4 years ago

I've not noticed. I suppose that the humming is probably the boiler...

0
WH
WhitegoodshelpVerified Engineer
Answered over 4 years ago

Ha ha no John it was definitely the washing machine. However I just realised that I had my subwoofer turned up a bit too high which made one hell of a massive low-frequency hum. Regarding the fault it's very difficult to be honest. All the lights and the display flashing and erratic or is that just an artefact of the video? If they are flashing like that then maybe there is a problem with the PCB such as a poor connection or maybe one of the components inside of the power supply. Unfortunately they are usually very expensive parts and is definitely not advisable to speculatively change one.

Whitegoods Help — appliance repair expert and forum host.
0
JO
Johndusty
Answered over 4 years ago

The flashing is purely in the recording, not visually apparent. If you like I can host a video call so you can see the behaviour live?

I'd love it if this problem could be accurately diagnosed

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