Boiler & Gas Help Centre
Expert answers from Gas Safe registered engineers — fix common problems or know when to call a professional
Help Categories
Find expert answers organised by topic
Boiler Issues
5 articles
Common boiler problems and solutions
Gas Safety
3 articles
Certificates, inspections, and legal requirements
Heating Systems
4 articles
Radiators, thermostats, and efficiency
Maintenance
4 articles
Servicing, cleaning, and prevention
Emergency Help
3 articles
Urgent issues and safety procedures
Installation
2 articles
New appliances and upgrades
Most Asked Questions
The questions our customers ask most often
What should I do if I smell gas?
If you smell gas, open windows, don't use switches or flames, evacuate the property, and call the National Gas Emergency Line on 0800 111 999 immediately.
What do boiler error codes mean?
Boiler error codes identify specific faults. Common codes indicate ignition failure, low pressure, or sensor problems. Check your boiler manual or call us for diagnosis.
Why are my radiators cold at the top but hot at the bottom?
Radiators cold at the top have trapped air inside. Bleed the radiator using a radiator key to release the air and restore full heating.
My boiler has broken down and I have no heating - what do I do?
Check your boiler pressure, reset the boiler if there's an error code, and check your thermostat settings. If the issue persists, call NK Gas Services for same-day emergency repairs.
What are the symptoms of carbon monoxide poisoning?
Carbon monoxide symptoms include headaches, dizziness, nausea, confusion, and tiredness. If you suspect CO poisoning, get fresh air immediately and call 999.
Why is my boiler leaking water?
Boiler leaks are caused by faulty pressure relief valves, corroded pipes, pump seals, or heat exchanger damage. Turn off the boiler and call an engineer.
Help Near You
Professional gas engineer help across West Midlands
Wolverhampton
Covering: Tettenhall, Wednesfield, Penn, Bilston
Walsall
Covering: Aldridge, Bloxwich, Brownhills, Willenhall
Also serving:
Simple Fixes You Can Try
Safe troubleshooting steps before calling an engineer
Repressurise Your Boiler
Bleed Your Radiators
Reset Your Boiler
Check Your Thermostat
Never attempt gas work yourself — always use a Gas Safe registered engineer
Smell Gas? Need Emergency Help?
If you smell gas or have a heating emergency, don't wait — get help immediately
⚠️ If you smell gas: Open windows, don't use switches or flames, leave the property if unsure
Common Boiler Problems
Fast answers to the most searched questions
Why is my boiler losing pressure?
Usually caused by a leak in the system, faulty pressure relief valve, or bleeding radiators. Repressurise via the filling loop — if it keeps dropping, call an engineer.
Read full guideBoiler not firing up?
Check the thermostat, gas supply, and error codes. Reset by turning off for 30 seconds. If it doesn't restart, the ignition or gas valve may need professional attention.
Read full guideRadiators cold at top?
Air trapped in the system. Bleed your radiators using a radiator key until water comes out. If the problem persists, you may need a powerflush.
Read full guideStill Need Help?
Our Gas Safe engineers are ready to diagnose and fix any heating issue
Book a Service
Professional diagnosis and repair from local Gas Safe engineers. Same-day available.
Book OnlineBoiler repairs from £75
Emergency Callout
24/7 emergency response across Wolverhampton, Walsall, Cannock and surrounding areas.
Call Now2-4 hour emergency response
Can't Find Your Answer?
Our engineers are happy to answer any question about boilers, heating, or gas safety — just give us a call.