Autotrol European 2 pin Transformer p/n 1000814

The 1000814 is the European 2-pin plug-in transformer that powers the electronic timer and control board on Autotrol water softener valves, including the 255, 268, 368 and Logix ranges. It steps mains 220-240V AC down to the 24V AC low-voltage supply the valve's circuit board and drive motor run on, and plugs directly into a standard UK/EU socket. If the softener display is blank or the valve won't cycle through regeneration, a failed transformer is one of the most common and easiest faults to fix. WrekinWater stocks this as a genuine-spec replacement transformer.

Technical specifications

Symptoms that mean you need this part

• The softener display is completely blank and won't power on at all
• The control valve motor doesn't run during regeneration despite the display appearing to work
• The transformer casing feels warm, buzzes, or shows visible damage at the plug or lead
• You've checked the mains socket and control board and traced the fault to no low-voltage output from the transformer

Why it fails / why it matters

Autotrol control valve timers and drive motors run on 24V AC supplied by an external plug-in transformer rather than mains voltage directly, which keeps the electronics inside the valve head low-voltage and safe. Transformer failure – a winding fault, a damaged plug, or moisture ingress – cuts power to the board, which typically shows up as a completely blank display or a valve that won't drive through its cycle. Testing for 24V AC output at the transformer with a multimeter confirms the fault, and replacing the transformer is the straightforward fix.

Why buy this from WrekinWater

WrekinWater has supplied Autotrol and Pentair valve components to installers and DIY customers for over 15 years from its Bettisfield, Shropshire base, and stocks the full range of Pentair Fleck, Autotrol, Clack and Kinetico parts. The business is rated Excellent on Trustpilot and has served more than 50,000 customers, and a fast-arriving transformer matters when a blank display means the softener has stopped regenerating altogether.

How to fit it

1. Unplug the existing transformer from the mains socket before disconnecting it from the control valve
2. Check how the low-voltage lead connects to the valve board, noting the connector type and orientation
3. Disconnect the old transformer's lead from the control board
4. Plug the new 1000814 transformer's lead into the same connector on the control board
5. Plug the transformer into the mains socket and confirm the softener display lights up
6. Run a manual regeneration to confirm the valve motor drives through a full cycle