Rangemaster F08 dishwasher: what it means & what to check

Stop using it for now. Carrying on with this fault risks further damage or a leak. Switch it off at the wall until it has been looked at.

What F08 actually means

The dishwasher's control board has lost or corrupted the settings stored in its memory, so it will not trust itself to run a programme.

On these Rangemaster machines F08 comes up when the board runs a check on its own stored parameters and the figures don't add up — what The fault calls a parameter checksum fault. It isn't reporting a blocked filter, a leak or a pump problem; the electronics have flagged themselves. The fault is normally shown with the programme lights blinking and Rangemaster's own guidance for this code is to call service rather than attempt anything at home.

What F08 looks like on a Rangemaster dishwasher

Most people find this page having searched for what the machine is doing rather than the code itself. On a Rangemaster dishwasher, F08 usually shows up as one or more of these:

Leaking
Water on the floor
Puddle underneath
Shuts itself down and won't restart
No function at all
Dead — nothing lights up
Lights flashing and nothing happening
Programme won't start

Recognise any of those? That is this fault, and the rest of this page explains what causes it and what you can check yourself.

What usually causes it

Corrupted settings in the dishwasher's main control board
A control board that has been disturbed by a power surge or spike
Failed memory on the board following a previous fault
Board fitted or reprogrammed with the wrong parameters for the model

What you can safely check yourself

Work through these in order. Anything beyond this — panels off, testing parts, anything to do with the wiring — is an engineer's job, and not one to attempt with the machine plugged in.

Turn the dishwasher off at the wall socket, leave it for a minute, then switch back on — occasionally the board clears the flag on restart
If it clears, run a short programme and watch whether the code returns; if it does, the board needs attention

Which Rangemaster models show F08

F08 means the same thing on all 3 of these models. If yours is not listed, the explanation above still applies — the code is set by the control board, not the model number.

RDW1045FI · RDW1260FI · RDW6012D22

Common questions about Rangemaster F08

What does F08 mean on a Rangemaster dishwasher?

The dishwasher's control board has lost or corrupted the settings stored in its memory, so it will not trust itself to run a programme. On these Rangemaster machines F08 comes up when the board runs a check on its own stored parameters and the figures don't add up — what The fault calls a parameter checksum fault. It isn't reporting a blocked filter, a leak or a pump problem; the electronics have flagged themselves. The fault is normally shown with the programme lights blinking and Rangemaster's own guidance for this code is to call service rather than attempt anything at home.

Can I fix Rangemaster F08 myself?

There are 2 checks you can safely do yourself first.

Turn the dishwasher off at the wall socket, leave it for a minute, then switch back on — occasionally the board clears the flag on restart.
If it clears, run a short programme and watch whether the code returns; if it does, the board needs attention.

This one usually needs an engineer once you have tried them.

How much does it cost to repair Rangemaster F08?

£66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.

Tried the checks and it's still showing F08?

This one usually needs an engineer once you have tried the checks above. Then it wants someone who can open it up.

What it costs, before you call: the price is the same whatever the fault turns out to be — £66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.

Our own engineers, not a call centre. We cover Nottinghamshire, Derbyshire and Leicestershire — most dishwasher faults are seen same day or next day.

Call 0115 648 0929 Book online — postcode and number is all we need

Outside our area? The explanation above still stands — take it to a local engineer and tell them the code. Knowing it saves them time and you money.

Other Rangemaster dishwasher codes

All Rangemaster fault codes and repairs →

What this looks like when it happens

Repairs we cover near you

Written by the engineers at ASAP Repairs, 0115 648 0929. We repair these machines for a living in Nottinghamshire, Derbyshire and Leicestershire.

Rangemaster F08 error — dishwasher