10/09/2026
🚨 1,042 PPM CARBON MONOXIDE — AND THE BOILER WAS STILL WORKING. 🚨
This is exactly why we tell customers not to skip their annual boiler service.
I attended a property this morning to carry out testing on a boiler. The customer had no idea what we were about to find.
As soon as I inserted my calibrated flue gas analyser, the combustion readings began climbing rapidly.
CO in the flue products exceeded 1,000 ppm and the CO/CO₂ ratio reached 0.0121.
The readings became so high that I removed my analyser before I could obtain a final stable reading, rather than risk damaging its CO sensor
⚠️ The boiler was still operating. That doesn't mean it was operating correctly.
After carrying out the necessary maintenance and corrective work, I carried out further combustion testing to ensure the appliance was operating correctly.
This customer was extremely fortunate that the problem was identified.
This is why an annual boiler service is far more than just “giving the boiler a clean.”
A proper service allows a Gas Safe registered engineer to inspect the appliance, check its combustion, identify deterioration or faults and make sure it is operating safely and correctly.
🔥 Heating working? That doesn't necessarily mean everything is OK.
🔧 Boiler not showing a fault code? That doesn't necessarily mean everything is OK.
📅 Can't remember your last service? Get it checked.
£65 + VAT for an annual boiler service could identify a problem before it becomes something far more serious.
📞 07794 012343
📧 [email protected]
🌐 www.pipesgroup.uk�
PIPESGROUP LTD
Gas Safe Registered 921690