Glow-worm Boiler Repairs Croydon
When a Glow-worm boiler develops a fault, most people don’t care about marketing claims. They want heating, hot water and a clear explanation of what’s actually gone wrong.
We repair Glow-worm boilers throughout Croydon, Thornton Heath, Selhurst, Addiscombe, Norbury and the surrounding areas. Whether the boiler is showing a fault code, losing pressure or refusing to ignite altogether, the first step is understanding what the boiler is trying to tell us.
Call 0203 576 6769 Book A Repair Visit
Most Boiler Faults Start Small
A surprising number of Glow-worm repair callouts begin with something that seemed minor. Pressure dropping occasionally. A boiler that needs resetting once every few weeks. Hot water taking slightly longer than normal.
Then winter arrives and the problem becomes impossible to ignore.
One of the advantages of manufacturer-specific repair pages is that many faults follow familiar patterns. Certain fault codes appear regularly. Certain components wear out over time. Some issues are linked to the boiler itself, while others are caused by the heating system connected to it.
Common Glow-worm Boiler Problems
The exact fault varies from property to property, but there are certain problems we come across repeatedly in Croydon homes.
Some boilers lose pressure gradually over time. If you’re constantly topping it up, our guide on boiler losing pressure explains the most common causes. Others lock out unexpectedly or fail to ignite when heat is demanded. Occasionally the issue isn’t the boiler at all but sludge, circulation problems or heating controls elsewhere in the system.
That’s why proper diagnosis matters before replacing parts.
Symptoms We Regularly Investigate
- Pressure dropping overnight
- Repeated lockouts
- No heating
- No hot water
- F22 fault codes
- F28 ignition faults
- F29 flame failures
- F75 pressure sensor issues
- Boiler noises
- Cold radiators
Understanding Common Glow-worm Fault Codes
F22
Usually indicates low water pressure within the heating system. If the pressure keeps falling, see our guide on boiler pressure dropping overnight. Sometimes simple. Sometimes linked to a larger issue causing pressure loss.
F28
An ignition fault where the boiler attempts to start but cannot establish a flame.
F29
Flame loss during operation. The boiler lights but cannot maintain normal operation.
F75
One of the more recognised Glow-worm faults. Often related to pressure sensing or circulation issues.
Not Every Glow-worm Fault Means A New Boiler
A lot of homeowners worry that a fault code means the boiler is finished. It usually isn’t that simple.
Sometimes a Glow-worm boiler needs a sensor, pump, ignition component or expansion vessel repair. Sometimes the problem is outside the boiler — dirty system water, poor circulation, low pressure or an issue with the controls.
If repair still makes sense, we’ll say that. If the boiler is older and the repair cost starts getting close to replacement territory, we’ll explain that clearly too.
Repair Or Replace?
This is usually the real question once a boiler starts playing up.
A one-off fault on a reasonably modern Glow-worm boiler is normally worth investigating properly. But if the boiler has been repaired several times, keeps locking out or parts are becoming difficult to source, replacement may be the better long-term route.
We don’t push that decision too early. The first job is diagnosis. Once we know what has failed, we can talk through the options properly. If you’re unsure whether a repair is worth doing, our guide on whether you need a new boiler or just a service can help.
Repair May Make Sense If:
- The boiler is generally reliable
- The fault is isolated
- Parts are available
- The system is otherwise in decent condition
- Repair cost is sensible compared with replacement
Replacement May Be Worth Considering If:
- The boiler is very old
- Breakdowns are becoming regular
- Repair costs are building up
- Efficiency is poor
- Hot water performance no longer suits the home
Typical Glow-worm Repair Situations
| Problem | Possible Cause | What Happens Next |
|---|---|---|
| F22 pressure fault | Low pressure, leak, expansion vessel or pressure issue | System pressure checked and cause investigated |
| F28 ignition fault | Ignition component, gas supply or control fault | Ignition sequence and safety checks carried out |
| F29 flame loss | Combustion, sensor or gas supply issue | Boiler operation checked under demand |
| F75 fault | Pump, pressure sensor or circulation issue | Pump response and pressure change checked |
A Typical Croydon Glow-worm Repair
One recent job involved a Glow-worm boiler in a flat not far from East Croydon. The customer had been topping the pressure up every few days and assumed the boiler itself was failing.
After checking the boiler and system properly, the issue turned out to be pressure related rather than a full boiler failure. That matters, because replacing the appliance would not have solved the actual problem.
This is why we prefer proper fault finding before giving advice. It saves time, avoids guesswork and usually gives the homeowner a much clearer decision.
Areas We Cover
We repair Glow-worm boilers across Croydon and nearby South London areas, including:
- Croydon
- Thornton Heath
- Selhurst
- Addiscombe
- Norbury
- South Croydon
- East Croydon
- West Croydon
Need Help With A Glow-worm Fault?
If your boiler is showing a fault code, losing pressure or refusing to fire up, make a note of the code before resetting it.
One reset is normally fine. Repeated resets can make diagnosis harder and may hide a safety issue.
Call 0203 576 6769Frequently Asked Questions
Can Glow-worm boilers be repaired?
Yes. Many Glow-worm boiler faults can be repaired, depending on the age of the boiler, the fault and whether parts are available.
What does an F22 fault mean on a Glow-worm boiler?
F22 usually relates to low pressure in the heating system. Sometimes the boiler simply needs repressurising, but repeated pressure loss should be investigated.
What does an F28 fault mean?
F28 is normally an ignition fault. The boiler is trying to light but cannot establish a flame.
Should I keep resetting my Glow-worm boiler?
No. One reset may be fine, but repeated resets usually mean the fault needs proper diagnosis. If the reset function itself is not responding, see our guide on boiler reset button not working.
Do you repair Glow-worm boilers in Croydon?
Yes, we repair Glow-worm boilers throughout Croydon, Thornton Heath, Selhurst, Addiscombe, Norbury and nearby areas.
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About MPS Heating & Plumbing LTD
MPS Heating & Plumbing LTD provides boiler repairs, servicing, installations and heating support throughout Croydon and nearby South London areas.
Gas work is carried out by Gas Safe registered engineers, with repairs explained clearly before work goes ahead.
Address:
46 Broughton Rd
London
CR7 6AL
Phone:
0203 576 6769
Email:
info@mpsheatplumb.co.uk
Gas Safe Registered:
ID 662170