Immergas Appliance Repair Service
Specialist repairs using genuine Immergas spare parts
Heating
Gas Safe registered engineers for Immergas boiler, condensing boiler, hot water cylinder and hot water storage tank. Fault diagnosis, part replacement and annual servicing across Nottinghamshire.
No hot water or heating?
Immergas heating breakdowns repaired fast by Gas Safe engineers. Available seven days a week across Nottinghamshire.
Heating
Professional Immergas hot water cylinder and hot water storage tank repair service in Mansfield. Certified technicians with genuine spare parts and a written warranty.
No hot water or heating?
Immergas heating breakdowns repaired fast by Gas Safe engineers. Available seven days a week across Nottinghamshire.
Climate Control
F-Gas certified engineers for Immergas split ac, cassette air conditioner, ducted ac, ceiling mounted air conditioner, console indoor floor standing ac and fan coil ac. Installation, fault diagnosis and refrigerant handling across Nottinghamshire.
Air conditioning not cooling?
Immergas climate control repairs by certified engineers. Same-day response available across Nottinghamshire.
Climate Control
Professional Immergas ducted ac and ceiling mounted air conditioner repair service in Mansfield. Certified technicians with genuine spare parts and a written warranty.
Air conditioning not cooling?
Immergas climate control repairs by certified engineers. Same-day response available across Nottinghamshire.
Climate Control
Professional Immergas console indoor floor standing ac and fan coil ac repair service in Mansfield. Certified technicians with genuine spare parts and a written warranty.
Air conditioning not cooling?
Immergas climate control repairs by certified engineers. Same-day response available across Nottinghamshire.
Renewable Energy
MCS-accredited installation and repair for Immergas heat pump water heater, air source heat pump and solar panels. Heat pump diagnostics, refrigerant handling and efficiency optimisation.
Heat pump underperforming?
Specialist Immergas renewable energy engineers. MCS-accredited service across Nottinghamshire.
Renewable Energy
Professional Immergas solar panels repair service in Mansfield. Certified technicians with genuine spare parts and a written warranty.
Heat pump underperforming?
Specialist Immergas renewable energy engineers. MCS-accredited service across Nottinghamshire.
Why Immergas Appliances Need Specialist Repair
Immergas appliances incorporate advanced proprietary systems that require certified engineers with brand-specific training to diagnose and repair correctly.
Immergas appliances use integrated electronic diagnostics. Our engineers connect directly to Immergas control boards using brand-specific tools to read fault codes and pinpoint issues accurately.
Every repair uses genuine Immergas spare parts sourced directly from authorised distributors. Original components ensure compatibility, performance and longevity — backed by a manufacturer warranty.
Immergas appliances must meet strict UK safety regulations. Our certified engineers follow Immergas service procedures and test every repair to BS EN standards before sign-off.
Many Immergas appliances feature Wi-Fi connectivity and smart home integration. Our engineers can diagnose firmware issues, reset connectivity modules and restore remote control functionality.
Common Immergas Error Codes
What does the 101 error mean on an Immergas heat pump?
The 101 error on an Immergas heat pump indicates a wiring fault between the control kit and outdoor unit. There is an electrical connection problem preventing proper communication. Switch off the heat pump at the isolator switch. Do not attempt to inspect or repair any wiring yourself. Contact a qualified technician to check the electrical connections between the indoor control unit and outdoor heat pump unit.
What does the 441 error mean on an Immergas heat pump?
The 441 error on an Immergas heat pump indicates cooling operation has stopped because the outdoor temperature has fallen below 9 degrees Celsius. This is normal protective behaviour, not a fault. The heat pump will automatically resume cooling operation when outdoor temperatures rise to within normal operating range. No action is required. The unit should resume normal operation as conditions change.
What does the 320 error mean on an Immergas heat pump?
The 320 error on an Immergas heat pump indicates an OLP sensor error. The overload protection sensor on the compressor has detected a fault. Switch off the heat pump at the isolator switch. Do not attempt to reset repeatedly. Contact a qualified technician with F-Gas certification for compressor and sensor inspection. This protection system prevents compressor damage from electrical overload.
What does the 221 error mean on an Immergas heat pump?
The 221 error on an Immergas heat pump indicates an outdoor unit temperature sensor malfunction. The temperature sensor on the outdoor unit is reporting incorrect readings or has failed. Switch off the heat pump at the isolator switch for five minutes. Switch back on and monitor for the error. If the error persists, contact a qualified technician for sensor testing and replacement.
What does the 425 error mean on an Immergas heat pump?
The 425 error on an Immergas heat pump indicates a supply voltage phase loss. This error applies only to three-phase models and indicates one of the electrical supply phases has been lost. Switch off the heat pump at the isolator switch immediately. Do not attempt to restart. Contact a qualified electrician to check the three-phase electrical supply. Operating with a missing phase can cause serious damage to the compressor motor.
Frequently Asked Questions
How do I reset my Immergas boiler?
Locate the reset button on your boiler's control panel, typically marked with a flame symbol or the word Reset. Press the button firmly. On most Immergas models, holding the button for approximately 5 seconds will initiate a restart. If the error clears, the boiler should resume normal operation. If the boiler does not reset or the same error returns, do not repeatedly press the reset button. Contact a qualified technician for diagnosis.
When does electrical integration (backup heating) activate on my Immergas heat pump?
Electrical integration activates automatically in certain conditions, including during defrost cycles and when outdoor temperatures are very low. The system controller determines when supplementary heating is needed to maintain target temperatures. If the heat pump alone cannot meet the heating demand within a reasonable time, the backup electric resistance provides additional heating capacity.
What annual maintenance does my Immergas boiler require?
Annual maintenance should include cleaning the heat exchanger on the fume side, cleaning the main burner, verifying correct ignition and operation, and checking burner settings for both heating and hot water phases. A visual inspection for leaks and corrosion is also required.
What periodic maintenance does my Immergas heat pump need?
Periodic maintenance includes visually checking for water leaks or oxidation on connections, verifying that safety devices have not been tampered with, and ensuring the outdoor unit remains free of debris. Check that drainage for condensate and defrost water is clear.
What pressure should my Immergas boiler system maintain?
The boiler pressure gauge should read a value between 1.0 and 1.2 bar when the system is cold. This is the optimal operating range for most Immergas boilers.
Areas We Cover in Nottinghamshire
Immergas appliance repair service across the ten largest towns in the county
Book a Immergas Repair
Specialist Immergas engineers. No-obligation quote.