Control Board Replacement – What You Need to Know

Every modern appliance – fridge, oven, washing machine – has a tiny computer called a control board. It tells the motor when to run, the heater when to heat, and the fan when to spin. When that board goes bad, the whole unit can act up or stop working altogether.

Common Signs of a Bad Control Board

Most people don’t realize the control board is the culprit until a few clear symptoms show up:

  • The appliance powers on but never completes a cycle.
  • Buttons or touch controls don’t respond.
  • Random error codes flash on the display.
  • Parts that usually work together, like the heater and the timer, act independently.

If you see two or more of these signs, it’s worth checking the board before ordering a new part.

DIY Replacement: Step‑by‑Step

Replacing a control board can be a straight‑forward job if you’re comfortable with basic tools. Here’s a quick walk‑through:

  1. Unplug the appliance. Safety first – even if the unit looks dead, a live wire can still shock you.
  2. Locate the board. Most boards sit behind a panel on the back or inside the door. Look for a flat, green or black circuit board with lots of wires attached.
  3. Document wiring. Snap a photo or label each plug with masking tape. One mistake and the appliance won’t work again.
  4. Remove the old board. Unscrew any mounting brackets, then gently pull the connectors off. Some pins are fragile – wiggle them, don’t pull hard.
  5. Install the new board. Align it with the mounting holes, secure it, then reconnect the wires exactly as you recorded.
  6. Test the appliance. Plug it back in and run a short cycle. If it works, re‑assemble the panel. If not, double‑check the connections.

Most control boards cost between £50 and £200, depending on the appliance. Add about £25‑£40 for a basic service call if you need a professional.

When you should call a pro:

  • You’re not comfortable handling electricity.
  • The board is inside a sealed unit, like a dishwasher, that requires special tools.
  • You keep getting error codes after a replacement – the problem might be deeper.

Professional electricians or appliance repair technicians have the right tools, warranty coverage, and the know‑how to diagnose hidden issues like a shorted power supply.

In the end, a faulty control board is a common reason appliances quit suddenly. Spotting the signs early, deciding whether you can DIY, and following a clear replacement guide can save you time and money. If you’re unsure, a quick call to a local repair service will give you peace of mind and avoid costly mistakes.

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