Vaillant Gas Boiler Repair Specialist in London
Advanced Vaillant Gas Boiler Engineers
If you are in need of a repair and your boiler is not within its guarantee, Contact Hub Heating Advanced Vaillant Boiler Engineers in London, we are Vaillant-trained engineers and have more than 15 years experienced in repairing and installing all types of Vaillant Boilers, we will get will visit your home to repair or replace the faulty components and get your boiler working again.
Our local plumbers and London gas-safe engineers are experienced, qualified, and ready to install all types of boilers. If you need a new boiler or boiler repair, do not hesitate to contact Hub Heating team today, we can have our local engineers with you in no time.
Vaillant Advanced Boiler Engineers
Vaillant Boiler repairs FAQs
Vaillant boilers are generally considered to be reliable and efficient, but like any mechanical device, they can develop faults. Some of the most common Vaillant boiler faults include:
No hot water or heating: This can be caused by a number of issues, including a faulty thermostat, a broken diaphragm or airlock, or a problem with the pump.
Low pressure: If the pressure in your Vaillant boiler drops below a certain level, it can cause the boiler to shut down. Low pressure can be caused by a leak in the system, a faulty pressure relief valve, or a problem with the expansion vessel.
Ignition problems: If your Vaillant boiler fails to ignite, it may be due to a faulty ignition electrode or a problem with the gas supply.
Error codes: Vaillant boilers are equipped with error codes to help diagnose faults. Common error codes include F22 (low water pressure), F28 (no ignition), and F75 (faulty pressure sensor).
Thermostat issues: Faulty thermostats can cause the boiler to switch on and off unexpectedly or fail to reach the desired temperature.
Kettling: Kettling is a term used to describe a boiler that makes a loud banging or rumbling noise. This can be caused by a buildup of limescale in the boiler's heat exchanger.
If you're experiencing any of these issues with your Vaillant boiler, it's important to contact a qualified heating engineer to diagnose and repair the fault.
Vaillant is a popular and reputable brand of boilers, known for their energy efficiency and reliability. Some of the most popular Vaillant boilers are:
Vaillant ecoTEC plus: This is a highly efficient combi boiler that can supply both heating and hot water. It has an A-rated energy efficiency rating and is compact in size, making it ideal for smaller homes.
Vaillant ecoTEC pro: This is another highly efficient combi boiler that is suitable for small to medium-sized homes. It has a wide range of power outputs and is easy to install and service.
Vaillant ecoFIT pure: This is a budget-friendly option that offers excellent energy efficiency and reliability. It is also compact in size and easy to install, making it ideal for smaller properties.
Vaillant ecoTEC exclusive: This is a high-end boiler that offers advanced features such as a touchscreen display and wireless connectivity. It is designed for larger homes and offers excellent energy efficiency and reliability.
Vaillant ecoTEC plus system: This is a system boiler that is designed to work with an external hot water cylinder. It is highly efficient and reliable and is ideal for homes with multiple bathrooms.
These are just a few of the most popular Vaillant boilers on the market. It's important to choose a boiler that is the right size and power output for your home, so it's always best to consult with a qualified heating engineer before making a purchase.
| Vaillant Fault Code | Meaning | Cause | Explanation |
|---|---|---|---|
| F.00 | Flow NTC open circuit | NTC broken, cable broken, bad connections | Flow sensor or wiring harness have failed. |
| F.01 | Return NTC open circuit | NTC broken, cable broken, bad connections | Return sensor or wiring harness have failed. |
| F.02 | DHW NTC open circuit | NTC loose, defective, bad connections | DHW sensor or wiring harness have failed. |
| F.10 | Flow NTC short circuit | NTC defective | NTC defective or harness earthing failed. |
| F.11 | Return NTC short circuit | NTC defective | NTC defective or harness earthing failed. |
| F.13 | Tank NTC short circuit | NTC defective | NTC defective or harness earthing failed. |
| F.20 | Safety temperature limiter by NTC activated | Flow-NTC not correctly thermal-connected or defective; appliance does not shutdown. | The flow temp. Has reached above 97 degrees. Possible, air, pump, sludge. Blocked heat ex., faulty NTC. |
| F.22 | Dry fire. Too little water in the appliance | Water pressure sensor defective, cable to pump or water sensor defective, pump blocked or defective, pump output too low. | Water pressure sensor defective, cable to pump or water sensor defective, pump blocked or defective, pump output too low. |
| F.23 | Water shortage | Temperature difference between flow and return too large. | Low water pressure, faulty pump, air, blocked system, faulty NTC. |
| F.24 | Water shortage | Temperature rise too quick. | Low water pressure, faulty pump, air, blocked system, faulty NTC. |
| F.27 | Incorrect sensing of flame | Flame detector defective. | Boiler has detected a flame when the boiler should be off. Possible flame rec prob, earthing, PCB. |
| F.28 | Appliance does not start | Faults in the gas supply such as:
Faults in the gas valve, wrong gas setting, igniter (ignition transformer, ignition cable, ignition plug) defective, ionisation current stopped (cable, electrode), faulty earthing in appliance, electronics, defective. | The boiler has attempted to ignite 3 – 5 times but failed. Check for gas at another outlet i.e., cooker, possible gas valve, low gas pressure, no gas, harness, PCB, plug, valve settings. |
| F.29 | Flame goes off during ignition | Gas supply temporarily stopped, faulty earthing of appliance. | The boiler has detected a flame, but the flame has gone out immediately. Check low gas pressure, faulty valve, blocked flue, blocked burner, flame rec, poor earth, PCB. |
| F.32 | Fan speed variation | Fan blocked, plug not inserted correctly on fan, hall sensor defective, fault in cable harness, electronics defective. | Fan blocked, plug not inserted correctly on fan, hall sensor defective, fault in cable harness, electronics defective. |
| F.49 | eBUS undervoltage | Short circuit on eBUS, overload on eBUS or two power sources on eBUS with different polarity. | Short circuit on eBUS, overload on eBUS or two power sources on eBUS with different polarity. |
| F.61 | Gas Valve defective | Short circuit/earth (ground) leak in cable harness to gas valves, gas. | The gas valve hasn’t been powered to open- check PCB, polarity, earth, harness, gas valve, coils. |
| F.62 | Gas valve shut off delay | Gas valve leaking, electronics defective. | The gas valve hasn’t closed immediately. Check valve, harness, PCB, earth, mini tightness test. |
| F.63 | EEPROM | Error – electronics. | PCB, polarity. |
| F.64 | Electronics/NTC fault | Short-circuit in flow or return NTC or electronics defective. | Polarity, harness, NTC, PCB. |
| F.65 | Electronics temperature too high | Electronics too hot due to external effect, electronics defective. | PCB, Polarity, harness, NTC, G10 door seal. |
| F.70 | No valid DSN in display and/or mainboard | Spare part failure display and mainboard interchanged at same time and device specific number not adjusted. | Usually occurs when a new PCB has been installed and the correct DSN (device specific number) has not been set. |
| F.71 | Flow NTC reports constant value (stuck at) | Flow NTC is defective. | Flow NTC is defective. |
| F.72 | Flow and/or return NTC fault | Flow and/or return NTC is defective (tolerances too big). | Flow and/or return NTC is defective (tolerances too big). |
| F.73 | Water pressure sensor signal out of range (too low) | Cable to water pressure sensor is broken or has a short-circuit at 0V or water pressure sensor defective. | Loose connection, faulty sensor, blocked sensor, harness, poor earth. |
| F.74 | Water pressure sensor signal out of range (too high) | Cable to water pressure sensor has a short-circuit at 5 V / 24 V or internal fault in water pressure sensor. | Loose connection, faulty sensor, blocked sensor, harness, poor earth. |
| F.75 | No pressure rise was detected on turning on the pump | Water pressure sensor or/and pump defective. Too little water in appliance; check adjustable by-pass; connect external expansion vessel to return. | The sensor has not detected a rise in pressure when pump starts, blocked sensor, faulty sensor, low water pressure, poor or faulty pump, PCB, air, blocked system, blocked filter. |
| F.76 | Overheating protection on primary heat exchanger triggered | Cable or cable connection of fuse in the primary heat exchanger defective, or primary heat exchanger defective. | Loose connection on harness, blocked hex, pump, air – new heat exchanger will be needed. |
| F.77 | condensate pump or feedback of accessory blocks heating | Condensate pump defective or flume flap feedback triggered. | Condensate backed up and not drained away, check pump, power, discharge point i.e., sink waste for blocks. |
| F.78 | wrong configuration with accessory link box | VR65 connected to combination boiler con no communication to mainboard connection error display mainboard. | Incorrect wiring, faulty, VR65, harness. |
We repair all types of Vaillant Gas Boilers including:
- Vaillant Combi Compact
- Vaillant ecoFITpure 412, ecoFITpure 415, ecoFITpure 418, ecoFITpure 425, ecoFITpure 430, ecoFITpure 435, ecoFITpure 612, ecoFITpure 615, ecoFITpure 618, ecoFITpure 625, ecoFITpure 630, ecoFITpure 825, ecoFITpure 830, ecoFITpure 835
- Vaillant ecoMAX 18E, ecoMax 28E, Ecomax VUW 236H, Ecomax VUW 286H
- Vaillant Ecotec plus 937, Ecotec plus 415, Ecotec plus 418, Ecotec plus 428, Ecotec plus 438
- Vaillant ecoTEC plus 624, ecoTEC plus 637, ecoTEC plus 825, ecoTEC plus 832, ecoTEC plus 835, ecoTEC plus 838, ecoTEC plus 837
- Vaillant Ecotec Exclusive 832, Ecotec Exclusive 838
- Vaillant Ecotec Plus 612, Ecotec Plus 615, Ecotec Plus 618, Ecotec Plus 624, Ecotec Plus 630, Ecotec Plus 637, Ecotec Plus 824, Ecotec Plus 831, Ecotec Pro 28, Ecotec Pro 24, ecoTEC pro 30, Ecotec Plus 937
- Vaillant Home System 12, Home System 15, Home System 18, Home System 25
- Vaillant ThermoCompact 615/2E, ThermoCompact 620/2E, ThermoCompact 624/2E, ThermoCompact 628/2E, ThermoCompact 637 E
- Vaillant TurboMax VUW 242E, TurboMax VUW 282E, Turbomax VUW 242/1E, Turbomax VUW 282/1E, TurboMax Plus 824, TurboMAX Plus 828/2E, TurboMAX Plus 837 E
- Vaillant VCW 20/1 T3W, VCW 25/1 T3W, VCW-Sine 18 T3W
- Vaillant aquaPLUS VUI 362_7
Yes, we provide Vaillant Boiler Installation, Vaillant Boiler Repair and Service in most of London areas and postcodes;
Vaillant Boiler Repair in North London:
Edgware, Highbury and Islington, Muswell Hill, Archway, Highbury, Crouch End, Southgate, Stoke Newington, Finchley, Highgate, Tottenham, Wood Green, Finsbury Park, Edmonton, Palmers Green, Holloway, Hornsey, North Finchley, Stroud Green, Tottenham Green, Tottenham Hale, Upper Holloway, West Green, West Hackney, New Southgate
Check out our new boiler installation and service in North London.
Vaillant Boiler Repair in West London:
Hounslow, Bedford Park, Shepherd’s Bush, Gunnersbury, White City, Wormwood Scrubs, North Kensington, Holland Park, Notting Hill, West Kensington, South Kensington, Bayswater, Acton, Chiswick, Hammersmith, Maida Vale, Bloomsbury, Ealing, Twickenham, Brentford, Hampton Hill, Kew, Feltham, West Kensington, Grove Park, Covent Garden, Isleworth, Whitton, Hammersmith and Fulham, Shepherd’s Bush, Charing Cross, Holborn, King’s Cross, Hampton, Hanwell
We also provide Vaillant Boiler Installation in West London
Vaillant Boiler Repair in Nort West London:
Preston, Wembley, Harrow, Camden, Hampstead, Kilburn, Stanmore, Belsize Park, Sudbury, Kentish Town, Pinner, West Hampstead, Cricklewood, Golders Green, Colindale, South Harrow, Hendon, Mill Hill, Brent Cross, Camden Town, Chalk Farm, Harlesden, Harrow on the Hill, Hoxton, Neasden, North Harrow, Rayners Lane, South Ruislip, Swiss Cottage, Wealdstone, Wembley Park, West Harrow, West Hendon, Ruislip, St John’s Wood, Willesden
We also provide Vaillant Boiler Installation in Nort West London
Vaillant Boiler Repair in Central London:
Kensington & Chelsea, Mayfair, Marylebone, Soho, Paddington, Camden, Westminster, Chinatown, Fitzrovia
We also provide Vaillant Boiler Installation in Central London
Vaillant Boiler Repair in South West London:
Richmond Upon Thames, Merton, Lambeth, Kingston Upon Thames, Kensington and Chelsea, Hammersmith and Fulham, Croydon, Carshalton, Teddington, Tooting Bec, Colliers Wood, Earls Court, Kingston Vale, Knightsbridge, Millbank, Parsons Green, Sands End, Southfields, Wandsworth Common, West Brompton, Battersea, Balham, Barnes, Castelnau, East Sheen, Mortlake, Putney
Norbury, Tooting, Earlsfield, Streatham, Raynes Park, South Wimbledon, Brompton, Chelsea,, Clapham, Nine Elms, Stockwell, Wallington, Chessington, Lower Morden, Morden Park, Old Malden, South Kensington, South Wimbledon, Tooting Bec, Sutton, Surbiton, New Malden, Worcester Park, Morden, Oval, Hampton Wick
New Boiler Installation and Replacement in South West London
Why choose Hub Heating Boiler ?
We are a local business with more than 15 years of experience, our engineers are honest, reliable, and provide affordable prices.
All Hub Heating gas engineers are fully qualified and ready to help you. We aim to have you as a long-term customer that's why we treat every client as a friend, making sure we are available to answer all after-installation questions and provide any assistance needed.
Very efficient service Thoroughly checked the hose and confirmed there was no internal leak from our boiler, they fixed all and cleaned it afterward, very pleased with their services, all were done as requested.
Request Free Quote
Vaillant Boiler Emergency Repairs
Has your boiler broken down and needs repairing?
We understand boilers can break down any time without any prior warning and no one likes not having access to hot water, especially in the cold months. Give us a call and we’ll send out one of our engineers to assess the issue and help repair your boiler.
At Hub Heating, we offer emergency boiler repair service so you won’t be waiting for long until your boiler is repaired. Our prices are competitive and we make sure you get the best boiler repair deal. We aim to fix your boiler fast and if you decide to install a new boiler, be sure we can help.
Our boiler replacement and repair services in London and the surrounding areas include:
Boiler & Water Heater Service, Fault Diagnosis & Repair. Installation of Cookers, Gas Fires & Hobs. Full Central Heating Installations. Un-vented systems. Conventional Systems. Combination Boilers. Cylinders, Pumps, Water Tanks, Radiators, Controls. Gas Leaks. Leaks and Component Repair in Central Heating System. Landlord's Gas Safety Checks. Power-Flushing. Plumbing Work- Showers, Sinks, Taps, Shower Pumps, Bathrooms. Pre-Purchase Reports. Free Estimates on New Installations. Worcester Bosch Trained Specialists & Installers.
Has your boiler broken down and needs repairing?
We understand boilers can break down any time without any prior warning and no one likes not having access to hot water, especially in the cold months. Give us a call and we’ll send out one of our engineers to assess the issue and help repair your boiler.
At Hub Heating, we offer emergency boiler repair service so you won’t be waiting for long until your boiler is repaired. Our prices are competitive and we make sure you get the best boiler repair deal. We aim to fix your boiler fast and if you decide to install a new boiler, be sure we can help.
Our boiler replacement and repair services in London and the surrounding areas include:
Boiler & Water Heater Service, Fault Diagnosis & Repair. Installation of Cookers, Gas Fires & Hobs. Full Central Heating Installations. Un-vented systems. Conventional Systems. Combination Boilers. Cylinders, Pumps, Water Tanks, Radiators, Controls. Gas Leaks. Leaks and Component Repair in Central Heating System. Landlord's Gas Safety Checks. Power-Flushing. Plumbing Work- Showers, Sinks, Taps, Shower Pumps, Bathrooms. Pre-Purchase Reports. Free Estimates on New Installations. Worcester Bosch Trained Specialists & Installers.
- Boiler Repair & Fault Finding
- Radiator Installation
- Radiator Maintenance
- Thermostats & Central Heating Controls
- Thermostatic Valves
- Powerflush
- Landlord gas inspection
- Central Heating Pump
- Immersion Heaters
- Boiler Installation & Replacement
- Boiler Servicing
- Gas Safety Certificates
- Central Heating Repair & Upgrade
- Central Heating Installation
Vaillant Boiler Repair Process
If you have a Vaillant boiler that needs repair, here is a general process you can follow:
Identify the problem: Before calling a professional, try to identify the problem with your boiler. Check the error code or warning lights, listen for unusual noises, and note any changes in performance.
Contact our qualified engineer: Contact Hub Heating qualified Vaillant boiler engineer, we are qualified and gas safe registered.
Schedule an appointment: Schedule an appointment with the engineer. Make sure to provide them with details about your boiler and the problem you are experiencing.
Inspection: Our engineer will inspect your boiler and diagnose the problem. They may need to dismantle parts of the boiler to determine the issue.
Repair: Once the engineer has diagnosed the problem, they will repair the boiler. They may need to replace parts or perform maintenance.
Testing: After the repair is complete, the engineer will test the boiler to make sure it is functioning correctly.
Maintenance: The engineer may recommend regular maintenance to prevent further problems with your boiler. Make sure to follow their advice and schedule any necessary maintenance appointments.
Overall, it's important to have your Vaillant boiler serviced regularly by a qualified engineer to ensure it is functioning safely and efficiently. If you notice any issues with your boiler, don't hesitate to contact a professional for help.
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