page updated 11 April 2018       Lovekin Ltd 2008-2018      Company Reg. 3950749      VAT No. 733 7196 21      73 Roberts Rd   Aldershot   GU12 4RB      01252 334440      Cookie Policy

Link to Lovekin Ltd boiler service home page

Gas Boiler Servicing in Woking

Lovekin service gas boilers in Woking, with timed appointments and a real commitment to skilled high quality work and excellent service. Many of our customers have been with us for over 20 years and we know most on first-name terms.  We also install and repair gas boilers and central heating systems.

01252 334440

Call us between 8:00 am and 6:00 pm weekdays

Outside hours leave a message and we’ll ring you back

Or you can email Paul

Clean Potterton Kingfisher II flame picture Combustion analysis on a new Baxi Solo HE Greenstar Ri

A new Baxi Solo HE being prepared for combustion analysis

Worcester Bosch Greenstar Ri. This is a high efficiency gas appliance. The main visible components are the cylindrical heat exchanger at the right and the premix fan at the left which draws gas from the gas valve below it. The fan mixes the gas with combustion air before passing up and across to the burner which is located at the top of the heat exchanger. Unlike older conventional appliances, the flame burns downwards from the burner in the draught created by the fan.

Our Service Prices all include VAT

We charge 94 to service the first appliance and 68 for each additional appliance except hobs, which are 38

If repair work or parts are needed these are charged extra but we will discuss it with you first. When we finish the work we’ll give you an invoice and take payment. Cash, cheque or transfer are fine but we don’t take cards.

10 Neighbour Discount

If you have a neighbour who wants a boiler service in the Woking area we’ll give each of you a 10 discount if you arrange to have them done together. Just let Ange know when you ring to make the appointments.

Lovekin are Gas Safe Registered (No. 66587) and Worcester Accredited Installers.

We work with mains gas only (natural gas) not LPG

Gas Safe Register No. 66587

Click an image for a bigger picture

Open-flued Potterton Kingfisher II

Conventionally flued appliances like this floor-standing Potterton Kingfisher IICF draw their air for combustion and dilution from room air. With the air they also draw in fluff and dust which can block the air intake filters. When the filters become blocked there is insufficient air for combustion and excess carbon monoxide, and eventually soot, are formed. If the soot deposits block the heat exchanger, poisonous carbon monoxide will spill out into the room air.

Flame picture in a Kingfisher 2. Most of the red colour comes from the face of the combustion insulation panels glowing. Orange, red and mauve tinges in the flames themselves are normal, caused by metallic dust particles passing through the burner.  Pale yellow flames, the colour of a candle flame, should ring alarm bells; these would indicate danger from incomplete combustion and a risk of carbon monoxide poisoning.

Combustion analysis data print out

Typical flue gas analysis printout showing very clean combustion

We're gradually updating another web site, lovekin.net, recording information about central heating problems and fault-finding. There are also articles about gross and net efficiency, central heating system pressure problems, radiator balancing and condensate problems. We’ll add more articles to the site as we are able.


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Apart from servicing, Lovekin install and repair gas boilers and central heating systems in Goldsworth Park, Horsell and Old Woking. We also have customers in Pirbright, Brookwood, Knaphill, Bisley, West End, Chobham and Mayford. We work in GU21, GU22, GU23 and GU24.

Gas Safe Register logo

Lovekin Gas Boiler Service Woking

Gas Safe Registered engineers have to re-do their courses and re-take their gas exams every 5 years and the emphasis is always on safety. When we service your gas boiler, your safety is our first consideration too. The location is important, particularly the position of the flue terminal relative to any opening doors or windows, and it must comply with the manufacturer’s installation instructions, We check the operation of the flue to make sure that flue gases are safely remove to outside air. We look for rust damage to the combustion casing and inspect the combustion seals to be sure that no poisonous flue gases can mix with the room air.

We then partially strip down the boiler. On newer, high efficiency boilers the manufacturers may limit how far the boiler is stripped down, with a deeper strip-down if the combustion analysis indicates that the boiler requires it. Older appliances, like back boilers, require a significant strip-down and thorough cleaning of the air intake filters, combustion chamber, pilot assembly and main burner and injectors.

When the boiler is re-assembled we will, if possible, carry out a combustion gas analysis using an electronic gas analyser. Flue gas analysis allows us to check a range of parameters, carbon monoxide and carbon dioxide levels and ratio, oxygen levels and gross or net efficiency. The test results tell us how much or the heat produced from the gas you pay for is used to heat the house or domestic hot water and how much is wasted in the flue gases.

To ensure that your boiler is burning the correct amount of gas we’ll check burner pressure or inlet working pressure (dynamic pressure) and we may run a gas rate test at the gas meter.

Baxi Bermuda 552 burner Dry joints on a failed Solo 2PF PCB Illuminated condensate trap Greenstar 24i Junior fan

The bright orange and red flame tips on this Baxi Bermuda burner have been caused by dust particles of metallic salts passing through the flame. They are harmless and the flame colour will settle down to a more normal mauve and blue within a few minutes. However, flames which are a pale match-flame yellow would be real cause for concern!

The nearest row of pins show clear dry joints. These are breaks in the solder connection, visible as a gap between the solder and the pin. This is a recognised fault on many circuit boards including this one from a Baxi Solo 2PF

Premix fan on a Greenstar boiler blows a regulated gas/air mix into the burner

Using a bright torch to illuminate the sump on this condensate trap allows us to see the debris through the translucent plastic. There is only a minimal amount here and the trap does not need to be disturbed. This Vaillant trap is clever. Instead of dribbling condensate continuously into the drain and risking blockage by freezing, this trap functions as an auto-syphon, dumping the warm condensate in intermittent loads of about 150 ml, making freezing much less likely.

Click a picture for more about us

Jacky is a director of Lovekin Ltd Paul is a director of Lovekin and a registered gas engineer Ange is our office manager and the friendly voice on the phone Lois is a registered gas engineer working with Lovekin