Gledhill Boiler Repairs
Experienced Gledhill Boiler Repairs specialists
Available 24 hours a day, 7 days a week
Insurance approved
All parts guaranteed for a year
Fully Gas Safe trained engineers
Gledhill Cylinder and Thermal Store Repairs London
Gas Safe and G3 qualified engineers • 24/7 call handling • London wide
Call Now: 0203 868 6251 | Request a Call Back
Tell us the model and any fault code or lights showing. We will advise the safest next step.
We cover Gledhill repairs in London, including PulsaCoil, ElectraMate, StainlessLite and other thermal store models. Common faults include no hot water, tundish dripping, immersion issues and expansion vessel problems.
Quick Navigation
Safety First
Water discharging from pressure relief valve? If water is continuously flowing from the tundish or discharge pipe, turn off the immersion heater and boiler feed. Call an engineer. Do not cap or block the discharge pipe.
Smell gas? If you have a gas boiler feeding the cylinder, turn off the gas supply at the meter if it is safe to do so. Open windows. Leave the property. Call the National Gas Emergency Service on 0800 111 999. Do not use switches, and do not use naked flames.
CO alarm sounding? Open windows immediately. Leave the property. Call 999. Do not re-enter until cleared by emergency services.
Cylinder leaking heavily? Turn off the water supply to the cylinder and the heat source (boiler or immersion). Call an engineer.
Quick Checks Before You Call
Before calling an engineer, these safe checks may resolve simple issues with your Gledhill unit.
Check the power supply
Is the immersion heater switched on at the isolator? Check the fuse in the spur. If you have a Gledhill ElectraMate or PulsaCoil, ensure the unit has power.
Check the programmer or timer
Is the heating or hot water scheduled to be on? Check the clock is set correctly. On Gledhill thermal stores, hot water availability depends on the store being charged.
Check the thermostat setting
The cylinder thermostat controls when the immersion or boiler feed heats the water. If set too low, water may not be hot enough. If set too high, the safety cut-out may have tripped.
Check the pressure gauge (unvented cylinders)
Gledhill unvented cylinders have a pressure gauge. Normal pressure varies by property and valve settings. If the gauge is unusually high or discharge is visible at the tundish, turn off the heat source and call an engineer.
Check the reset button
Some Gledhill units have a manual reset button, often behind a cover. If the thermal cut-out has tripped, you may be able to reset once. If it trips again, do not keep resetting. Call an engineer.
Gledhill Symptoms and Fault Indicators
Gledhill thermal stores and unvented cylinders vary by model. Some have digital displays with fault codes. Others use indicator lights or have no display. The table below is a guide to common symptoms. Tell us exactly what you see.
| Example symptom / indicator |
Common meaning |
What to do |
| No hot water |
Immersion not heating, thermal store not charged, or thermostat fault. |
Check power, timer, and thermostat. If all are fine, call an engineer. |
| Water not hot enough |
Thermostat set too low, immersion element failing, or thermal store not fully charged. |
Check thermostat setting. If correct, call an engineer. |
| Water too hot / overheating |
Thermostat stuck on or thermal cut-out not functioning. |
Turn off immersion and boiler feed. Call an engineer immediately. |
| Pressure relief valve discharging |
Expansion vessel failed, pressure too high, or thermostat fault causing overheating. |
Turn off heat source. Call an engineer. Do not block the discharge. |
| Low pressure on gauge |
Leak in system or pressure reducing valve issue. |
Call an engineer. Do not attempt to repressurise an unvented cylinder yourself. |
| Red light / fault light |
Safety cut-out tripped or system fault on some models. |
Try reset once if accessible. If it trips again, call an engineer. |
| Unit leaking |
Internal corrosion, seal failure, or fitting issue. |
Turn off water supply and heat source. Call an engineer. |
Need help now? Call 0203 868 6251 and tell us the model and what you see. We handle Gledhill unvented cylinder and thermal store faults in London, including tundish discharge, immersion issues and expansion vessel problems.
Most Searched Gledhill Problems
If your Gledhill cylinder or thermal store is not producing hot water, keeps tripping, or is discharging water from the tundish, tell us the model and we will confirm the safest next step. Common searches include PulsaCoil no hot water and ElectraMate faults.
No hot water from Gledhill PulsaCoil or ElectraMate
The Gledhill PulsaCoil and ElectraMate are popular thermal store units. If you have no hot water, check power supply, timer, and thermostat first. If the thermal store has not been charged (heated), there will be no hot water available. If power and settings are correct but there is still no hot water, the immersion element, thermostat, or controls may have failed. Call an engineer for Gledhill repair.
Pressure relief valve keeps discharging
If water is continuously flowing from the tundish or discharge pipe on an unvented Gledhill cylinder, the expansion vessel may have failed or the thermostat may be stuck, causing overheating. Turn off the heat source and call an engineer. Do not block or cap the discharge pipe as this is a safety feature.
Thermal cut-out keeps tripping
If the thermal cut-out on your Gledhill unit keeps tripping, the thermostat may be faulty or there may be a circulation issue preventing heat from dissipating properly. Try resetting once. If it trips again, do not keep resetting. Call an engineer to diagnose the cause.
Why Gledhill Units Develop Faults
Gledhill is a UK manufacturer specialising in unvented cylinders and thermal stores. Here is what we commonly see.
Immersion heater failure
Immersion elements can fail over time, especially in hard water areas where limescale builds up. Symptoms include no hot water or water not reaching full temperature.
Thermostat and control faults
Thermostats control when heating activates and when it stops. A faulty thermostat can cause no hot water, water not hot enough, or overheating and thermal cut-out trips.
Expansion vessel failure (unvented cylinders)
Unvented cylinders have an expansion vessel to absorb pressure changes as water heats. When the vessel fails, pressure rises and water discharges from the pressure relief valve. This requires G3 qualified engineer repair.
Scale build-up
In hard water areas, limescale can build up on immersion elements and heat exchangers, reducing efficiency and causing premature failure. Regular servicing helps prevent this.
Gledhill Models We Repair
We repair Gledhill unvented cylinders and thermal stores in London, including PulsaCoil, ElectraMate, StainlessLite, and other models. If you can, tell us the model number and approximate age. We will check parts availability before booking where possible.
Important: Unvented hot water cylinders require G3 qualified engineers for certain repairs. Gas Safe registration covers boiler and gas appliance work. G3 qualification covers unvented cylinder work. Our engineers hold both qualifications where required and will advise on the scope of work.
Repair or Replace Your Gledhill Unit?
We help you decide based on age, reliability, and parts availability.
Repair makes sense when
- Unit is under 10 years old
- This is the first major fault
- Parts are readily available
- Unit has been regularly serviced
Replacement may be better when
- Unit is 15 years old or more
- You have had multiple breakdowns recently
- Parts are obsolete or hard to source
- The cylinder is corroded or leaking from the vessel itself
- Hot water demand has increased beyond the unit capacity
Our engineers give honest assessments. If we cannot source parts or the repair is not cost effective, we will tell you.
Gledhill Servicing
Annual servicing reduces breakdown risk and keeps your Gledhill unit running efficiently. See Boiler servicing London.
Landlords and Letting Agents
We provide cylinder and thermal store repairs for landlords across London. See Landlord gas safety certificate (CP12).
Gledhill Repairs Across London
London wide coverage for Gledhill repairs where parts are available. Book an engineer or view our London areas we cover.
Other Boiler Brands We Repair
Worcester • Vaillant • Ideal • Baxi • Glow worm • Viessmann • Potterton • Vokera • Alpha • Ferroli
View all brands
Gledhill Repair FAQs
Do you repair Gledhill PulsaCoil and ElectraMate?
Yes, we repair Gledhill thermal stores including PulsaCoil and ElectraMate models. Tell us the model and fault when you call.
Do you need G3 qualification for Gledhill repairs?
Some repairs on unvented cylinders require G3 qualification. Our engineers hold the appropriate qualifications and will advise if your issue requires G3 scope work.
How quickly can you attend for a Gledhill breakdown?
We offer same day attendance where slots are available. For no hot water, we prioritise urgent breakdowns. Call our 24/7 line and we will advise availability.
How much does a Gledhill repair cost?
Costs vary depending on the fault and parts required. We diagnose first and quote before any repair work begins.
Related Services
Speak to Our Team
For safe next steps, call now or request a call back.
Call 0203 868 6251 | Book an Engineer
Gas Safe and G3 qualified • 24/7 call handling • Quote before work
