25. April 2026

The £30 Sensor That Saved £3,500

A Customer in East London called me. Three engineers had told her she needed a new boiler. Quotes between £3,000 and £4,500.

I spent two hours. I found a failing thermistor - a £30 sensor that was telling the boiler the wrong temperature.The boiler wasn't dead. It was confused.

I replaced the sensor. The boiler has worked perfectly for two years.

She saved over £3,000. And she now has a boiler specialist for life.

That is the power of forensic diagnosis. Not guessing. No guessing. Not selling. Just finding the truth.