Rangemaster SE 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 SE actually means

The dishwasher's control board has checked its own stored settings, found them corrupted, and stopped rather than run a programme it can't trust.

Every time it powers up, the control board runs a checksum on the programme data held in its memory o how long to fill, when to heat, when to drain. On this fault the sum doesn't add up, so the board refuses to continue and flags SE, usually with the indicator lights flashing together. It isn't a blockage, a leak or anything to do with the water side o the machine has lost confidence in its own memory.

What SE 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, SE usually shows up as one or more of these:

Dishwasher not draining
Water left in the tub at the end of the cycle
Stops mid-cycle full of water
Standing water in the bottom
Not filling with water
No water going in
Takes for ever to fill
Stops right at the start of the cycle

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 programme data in the control board's memory
A mains spike or sudden power cut part-way through a cycle
A failing main control board
Damp or a poor connection on the control board after a leak elsewhere in the machine

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 o a clean restart occasionally clears the fault
If it restarts, run a short programme empty and watch whether SE returns; a one-off after a power cut often doesn't come back
Check the plug and socket are not shared with an extension lead or adaptor that could be causing interruptions

Which Rangemaster models show SE

SE means the same thing on this model. If yours is not listed, the explanation above still applies — the code is set by the control board, not the model number.

RDW6012D22

Common questions about Rangemaster SE

What does SE mean on a Rangemaster dishwasher?

The dishwasher's control board has checked its own stored settings, found them corrupted, and stopped rather than run a programme it can't trust. Every time it powers up, the control board runs a checksum on the programme data held in its memory o how long to fill, when to heat, when to drain. On this fault the sum doesn't add up, so the board refuses to continue and flags SE, usually with the indicator lights flashing together. It isn't a blockage, a leak or anything to do with the water side o the machine has lost confidence in its own memory.

Can I fix Rangemaster SE myself?

There are 3 checks you can safely do yourself first.

Turn the dishwasher off at the wall socket, leave it for a minute, then switch back on o a clean restart occasionally clears the fault.
If it restarts, run a short programme empty and watch whether SE returns; a one-off after a power cut often doesn't come back.
Check the plug and socket are not shared with an extension lead or adaptor that could be causing interruptions.

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

How much does it cost to repair Rangemaster SE?

£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 SE?

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 SE error — dishwasher