HeatCore C1 Care Guide

Regular care and maintenance keeps your HeatCore C1 gas combi boiler running safely and efficiently. Most tasks below are simple homeowner checks. However, any work that involves opening the boiler casing or accessing internal components must be carried out by a Gas Safe registered engineer.

Monthly Checks

System pressure

1. Check the pressure gauge on the front of the boiler when the system is cold (heating off for at least one hour).
2. The needle should be in the green zone between 1.0 and 1.5 bar.
3. If the pressure has dropped below 1.0 bar, repressurise the system using the filling loop. See our guide: How to Repressurise Your Heating System.

Condensate pipe

1. Locate the condensate pipe — a white or grey plastic pipe that runs from the bottom of the boiler to an external drain.
2. Check the pipe is not blocked, kinked, or showing signs of damage.
3. In winter, check for ice formation on any external section of the pipe (see Winter Care below).

Casing

1. Wipe the outside of the boiler casing with a soft, dry or slightly damp cloth to remove dust.
2. Do not use abrasive cleaners, solvents, or spray products directly onto the boiler.

Annual Service (Mandatory)

Your HeatCore C1 must be serviced every 12 months by a Gas Safe registered engineer. This is a legal requirement for landlords and a condition of your warranty. During the annual service, the engineer will:

• Inspect and test all gas connections and seals
• Check the burner, ignition electrode, and flame detection
• Inspect and clean the heat exchanger
• Check the expansion vessel pre-charge pressure (typically 0.75–1.0 bar)
• Test the flue for safe combustion and CO levels
• Check the condensate trap and drain
• Verify all safety devices are functioning correctly
• Check the flue terminal externally — ensure it is clear of obstructions, nests, or vegetation

After the service, the engineer will provide a gas safety record. Keep this document — it is your proof of compliance and warranty continuity.

Winter Care

Condensate pipe freezing

The condensate pipe is the most vulnerable part of the system in cold weather. If the external section freezes, the boiler will lock out with an error code (typically EA). To protect against this:

• Lag the condensate pipe — wrap any external sections with foam pipe insulation, paying special attention to bends and the open end near the drain
• If the pipe has already frozen, thaw it gently by pouring warm (not boiling) water over the frozen section, or by applying a warm cloth
• Once thawed, reset the boiler by pressing the reset button on the display

Frost protection

During cold spells, keep your heating on a low frost-protection setting (typically 5–10°C on the thermostat) rather than switching it off completely. This prevents internal pipework from freezing and avoids costly damage to the system. Most programmable thermostats have a dedicated frost mode.