Main Boilers
Compare Main boilers including combi, regular and system boilers and gas, oil and electric boilers.
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Main Combi Boilers
Main combi boilers are narrow wall mounted boiler that are generally located in a kitchen or bathroom and tucked away within a cupboard and provide prompt access to hot water from the mains water supply to taps and radiators. Main combi boilers are energy efficient units with low running costs that are ideally suited to apartments and small to medium sized houses with 1 to 2 bathrooms. Main combi boilers don’t require hot water tanks or cylinders as a regular boiler or system boiler does therefore making these Main combi boilers cheaper to install.
| Boiler | Efficiency | Output | Warranty | MPN | Boiler Type |
|---|---|---|---|---|---|
| Main Eco Compact 25kW Gas Combi Boiler | 93% | 25kW | 5 Years | Combi | |
| Main Eco Compact 30kW Gas Combi Boiler | 93% | 30kW | 5 Years | Combi | |
| Main Eco Elite 25kW Gas Combi Boiler | 89% | 25kW | 5 Years | Combi | |
| Main Eco Elite 30kW Gas Combi Boiler | 88.7% | 30kW | 5 Years | Combi |
Main System Boilers
| Boiler | Efficiency | Output | Warranty | MPN | Boiler Type |
|---|---|---|---|---|---|
| Main Eco Compact 15kW Gas System Boiler | 93% | 15kW | 5 Years | System | |
| Main Eco Compact 18kW Gas System Boiler | 93% | 18kW | 5 Years | System | |
| Main Eco Elite 24kW Gas System Boiler | 89.1% | 24kW | 3 Years | System | |
| Main Eco Elite 28kW Gas System Boiler | 88.8% | 28kW | 3 Years | System |
Main Regular Boilers
| Boiler | Efficiency | Output | Warranty | MPN | Boiler Type |
|---|---|---|---|---|---|
| Main HE A 12kW Gas Regular Boiler | 88.7% | 12kW | 3 years | Regular | |
| Main HE A 15kW Gas Regular Boiler | 89% | 15kW | 3 years | Regular | |
| Main HE A 18kW Gas Regular Boiler | 88.7% | 18kW | 3 years | Regular | |
| Main HE A 24kW Gas Regular Boiler | 88.9% | 24kW | 3 years | Regular |
| Fault Code | System Behaviour |
|---|---|
| E168 | Error code E168 could mean that your boiler has detected a problem but can’t work out exactly what it is; |
| E20 | Central Heating NTC Fault indicate faulty components. You should make a note of the displayed error code |
| E28 | PCB Fault indicate faulty components |
| E50 | Hot Water NTC Fault indicate faulty components |
| E110 | Safety Thermostat operated – displayed when the primary water pressure is less than 0.5 bar. After repressurising the system the boiler should operate. Your installer will be able to advise you about the method of repressurising. |
| E119 | Water pressure switch not operated – displayed when the primary water pressure is less than 0.5 bar. After repressurising the system the boiler should operate. Your installer will be able to advise you about the method of repressurising |
| E33 | Interruption Of Gas Supply or Flame Failure indicates that the gas supply has been interrupted, ignition has failed or the flame has not been detected. Ensure that the gas supply has not been turned off, and turn the selector switch to the reset position and hold for at least 5 seconds. If the boiler does not relight, or the code is displayed regularly. |
| E60 | Fan or fan wiring fault |
| Fault Code | System Behaviour |
|---|---|
| E09 | Gas valve connection error |
| E15v | Gas valve error |
| E20 | Central heating negative thermistor coefficient (NTC) sensor error |
| E28 | Flue negative thermistor coefficient (NTC) sensor error |
| E40 | Central heating return sensor error |
| E83 | Communication error |
| E109 | Pre-circulation fault |
| E110 | Safety thermostat operated |
| E118 | Primary system water pressure too low |
| E125 | Circulation error |
| E128 | Flame error |
| E130 | Flue negative thermistor coefficient (NTC) sensor operated |
| E133 | Interruption of gas supply or flame error |
| E135 | Interruption of gas supply |
| E154 | Flow return sensor temperature test |
| E160 | Fan or fan wiring error |
| E270 | Circulation fault (dry fire) |
| E321 | Hot water negative thermistor coefficient (NTC) error |
| E384 | False flame |