BoilerFaultCodesTechnical description
Compressor Discharge Temperature High
What causes this fault?
This fault occurs when the gas leaving the compressor becomes dangerously hot, which usually happens because heat isn't being moved away from the unit quickly enough. The most common cause is restricted water flow through the system due to a failing pump or a blockage, but it can also be triggered if the unit is leaking refrigerant.
This fault is more common during summer heatwaves or periods of very high demand for hot water, as the system has to work harder to reject heat.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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