Gas Boiler Servicing

Clean blue flames with slight tints of red and mauve

I’m sorry, but for family reasons we have had to stop working and will shortly cease to trade

Photos

The selection of pictures below will give you some idea of the range of gas boilers we work on and what we do during a service.
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  • Clean blue flames with slight tints of red and mauve
    Clean blue flames on an Ideal Concord boiler main burner
  • Red expansion vessel to the left of the stainless steel combustion chamber
  • This ancient room-sealed boiler was still working safely and quite efficiently after over 40 years
  • This pilot burner shut down correctly due to insufficient combustion air to the pilot burner
  • The filter mesh from this back boiler burner must be checked and cleaned during servicing
  • These tight flue pathways can be significantly blocked with rust or even the original production casting sand
  • Red insulated, carbon core ignition lead on early Potterton Suprima boilers. The carbon would crack and the lead would fail
  • The orientation of the hose caused it to kink. This prevented the air pressure switch from registering the correct fan pressure
  • Potterton Netaheat boiler earthing bracket electrode, burned away by the pilot flame
    The earthing bracket electrode, to the left of the iginition electrode rod, has burned away
  • New Netaheat Electronic earthing bracket electrode, curved to extend its life
  • Precision pilot, also known as ASD (atmospheric sensing device) or ODS (oxygen depletion sensor)
  • It’s unusual to see a circuit board this badly burnt!
  • Old Enertech type Suprima PCB with typical scorch mark
  • Badly rusted burner from a Baxi Bermuda back boiler. Rusting was caused by leakage from the main heat exchanger above it
  • This boiler was near the end of its life!
  • The oval seal immediately behind the area numbered 0893 99 has degraded and allows condensate to drip out
  • Poor quality insulation material in this Ideal Icos boiler led to brittle insulation flaking off
  • Pilot flame in an Ideal Concord wall boiler. The white line in the blue flame was a glowing metallic dust particle passing through
  • The tinges of mauve in these flames are completely normal
  • Clean blue flames. The tinges of red and mauve are normal
  • Checking main burner pressure using an electronic combustion gas analyser
  • The allen key is used to adjust the high rate combustion ratio
  • The clear hose connected in place of the red cap on this Greenstar Ri boiler should give the correct negative pressure reading
  • The white mini-screwdriver is used to operate the burner rate over-ride during servicing
  • The green and blue components are part of the filling link to top up system water pressure
  • Inner face of kitchen cupboard door darkened by candle soot
    The soot on the cupboard door didn’t come from the boiler but from over-use of candles in the kitchen

Technical

If you want some of the gas industry terms explained, or a bit of the related basic science, take a look at our Technical Articles