Table of Contents
Attention: You can only go so far when it comes to DIY boiler maintenance. However, for a more rigorous inspection, with the right tools and expertise, you'll need to contact a professional. A Gas Safe Registered engineer will conduct a proper boiler maintenance check.
Possible Fault: Outdoor Sensor Error
Action: Outdoor Sensor Fault, Check the Sensor: Check in IP Menu the Outdoor Sensor Value Reads Correctly.
Possible Fault: Central Heating Thermistor Sensor Fault
Action: Check resistance reading across the Sensor is approx. 12kohms at 25 degrees c. if not suspect sensor.
Possible Fault: Flue Thermistor Fault
Action: Check flue Sensor Value Reads Correctly. Check for blocked flue.
Possible Fault: HW Flow Sensor Fault
Action: Check resistance reading across the Sensor is approx. 12kohms at 25 degrees c. if not suspect sensor.
Possible Fault: Water Pressure Sensor Fault
Action: Replace the water pressure sensor.
Possible Fault: Internal Clock Time Error On PCB
Action: Not Correct Configuration of Clock Time; Reset clock.
Possible Fault: Poor Circulation
Action: Check pump; Check that the system is full of water; Check for blockages in the system.
Possible Fault: Boiler Overheat Tripped
Action: Check that boiler temp is not over 110 degrees C; Check for continuity across the O/H stat; Check pump for circulation; Clear air from system.
Possible Fault: Maximum Limit of Flow Temperature
Action: Check that boiler temp is not over 110 degrees C; Check for continuity across the O/H stat; Check pump for circulation; Clear air from system.
Possible Fault: System Pressure High (> 2.9 Bar)
Action: This Is Displayed When the Primary Water Pressure Is Greater Than 2.8 Bar. Drain water from system until pressure is at 1 - 1.5bar. Check expansion vessel is charged.
Possible Fault: System Pressure Low (< 0.5 Bar)
Action: Check for water leaks; Check the expansion vessel has the correct charge; Add Water Via Filling Loop. Restoring The Correct Pressure Will Reset The Error.
Possible Fault: System Pressure Low (< 0.5 Bar)
Action: Check for water leaks; Check the expansion vessel has the correct charge; Add Water Via Filling Loop. Restoring The Correct Pressure Will Reset The Error.
Possible Fault: Primary Water Circulation Fault
Action: Check pump; Check that the system is full of water; Clear air from system; Check for blockages in the system; Check that the thermistors are correctly located.
Possible Fault: Legionella Protection Temperature Not Reached
Action:
Possible Fault: Loss of Flame During Operation
Action: Loss of Flame In Operation; Check Clean Or Replace The Sensing Electrode, Clean The Burner Surface And Re-Calibrate.
Possible Fault: Ignition Fault
Action: Check The Wiring; Check The Supply Pressure; Purge The Gas Supply To Remove Air; Check for spark at electrode; Check Ignition and sensing Electrode Condition and Clean/Replace If Necessary; Check Gas Valve is opening; Check Condensate Drain For Blockage.
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Q: What kind of fuel does your boiler use?
Possible Fault: Forced Reset Unit Unlocked
Action: Heating Flow Switch Error (Ireland) Pressure Sensor Error (UK)
Possible Fault: Fan Fault
Action: Check the Fan and The Cable; Probable cause fan failure.
Possible Fault: Air Pressure Switch Error
Action: Check connections across air pressure switch.
Possible Fault: Heating Flow Switch Error (Ireland) Pressure Sensor Error (UK)
Action: Heating Flow Switch Error (Ireland) Pressure Sensor Error (UK)
Possible Fault: Air Pressure Switch Fault
Action: Check connections across air pressure switch.
Possible Fault: Dry Fire
Action: Check The Sensor; Check the system has water in it; Check the pump for circulation.
Possible Fault: Earth Connection Error
Action: Check electrical supply to appliance.
Possible Fault: Heat Exchanger Temperature Exceeded (Greater Than 95 Degrees)
Action: This is a temporary error and will clear automatically.
If you can`t find the problem 
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Have tried resetting your boiler
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It`s time to call our team for help
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