Gas Fire Service Wymondham: Safety Check & Repair

A gas fire service in Wymondham by EPH Services engineer Jim revealed a sooting gas fire caused by a blocked air vent. The fire was serviced, the air vent cleared, and full combustion checks carried out to restore safe operation.

Gas fire service Wymondham: the safety issue we found

During a routine gas safety inspection at a property in Wymondham, our service engineer Jim identified a potentially dangerous situation. The gas fire had been sooting up—a clear sign that combustion was not taking place correctly.

Upon further investigation, Jim found that the tenants had deliberately blocked the air vent that supplies the fire with combustion air. They had done so because cold air was blowing around their feet, causing discomfort. While understandable from a comfort perspective, this created a serious safety hazard.

Why air vents are essential for gas fires

Air vents are not optional extras—they are critical safety features required for any gas appliance. Gas fires need a constant supply of fresh air to burn fuel cleanly and safely. When this air supply is restricted or blocked, incomplete combustion occurs.

Incomplete combustion produces carbon monoxide, a colourless, odourless gas that can be fatal. It also causes sooting, as visible in the photograph, which is a warning sign that the appliance is not operating safely. Blocking air vents, even to improve comfort, puts occupants at serious risk.

This is exactly why annual gas safety checks and servicing are so important—they catch these issues before they become dangerous.

The work we carried out

Jim completed a full service to restore the fire to safe working order. The work included:

• Clearing the blocked air vent to restore proper ventilation
• Cleaning the gas fire to remove soot deposits
• Servicing all components of the appliance
• Carrying out full combustion analysis to ensure safe, efficient operation
• Advising the tenants on the importance of keeping air vents clear

After the service, the fire passed all combustion checks and was safe to use again. We explained to the tenants why the air vent must remain unobstructed at all times, and discussed alternative solutions for managing drafts without compromising safety.

What to do if your gas fire looks like this

If you notice sooting, staining, or discolouration around your gas fire, stop using it immediately and contact a Gas Safe registered engineer. These are warning signs that the appliance is not burning fuel correctly and may be producing carbon monoxide.

Never block air vents, even temporarily. If you experience cold drafts from ventilation grilles, speak to a qualified heating engineer about safe solutions—such as repositioning furniture, adding draft excluders elsewhere in the room, or upgrading to a more efficient heating system.

Our team at EPH Services is Gas Safe registered and covers Wymondham and the wider Norfolk area. We’re always happy to help with gas fire servicing, safety checks, and advice on keeping your home warm and safe.

Frequently asked questions

Why does my gas fire produce soot?

Sooting is caused by incomplete combustion, usually due to insufficient air supply, a blocked flue, or a faulty burner. Blocked air vents are a common cause. If you see sooting, stop using the fire and call a Gas Safe engineer immediately.

Can I block the air vent if my gas fire blows cold air?

No. Air vents are a legal safety requirement and must never be blocked. They supply the oxygen needed for safe combustion. Blocking them can cause carbon monoxide production and is extremely dangerous. Speak to a heating engineer about alternative draft solutions.

How often should a gas fire be serviced?

Gas fires should be serviced annually by a Gas Safe registered engineer. Regular servicing ensures safe operation, maintains efficiency, and is often a requirement for insurance and landlord safety certificates.

What are the signs of a dangerous gas fire?

Warning signs include sooting or staining, a yellow or orange flame (should be mostly blue), the smell of gas, the pilot light frequently going out, or increased condensation in the room. If you notice any of these, stop using the appliance and call a Gas Safe engineer.

If you need a gas safety check, gas fire service, or have any concerns about your heating appliances in Wymondham or across Norfolk, please contact EPH Services. Our Gas Safe registered engineers are here to keep your home safe and warm.