Heat Pump Maintenance Checklist: What Homeowners Can Do

Monthly Checks

• Check the controller display for any error codes or warnings
• Check system pressure (should be 1–2 bar on the pressure gauge)
• Listen for any unusual noises from the outdoor unit
• Check that the outdoor unit has clear airflow on all sides

Seasonal Checks — Spring

• Clear debris (leaves, twigs) from around and under the outdoor unit
• Check the condensate drain is clear and draining freely
• If your unit has washable air filters, clean them now
• If switching to cooling mode (for heat pump/AC systems), test the cooling function before warm weather arrives

Seasonal Checks — Autumn

• Clear autumn leaves from around the outdoor unit
• Bleed all radiators to remove trapped air
• Test the heating system before cold weather — don't wait for the first cold night to discover a problem
• Book your annual professional service if not already done
• Ensure the condensate drain is clear before potential freezing weather

Annual Professional Service

Once a year, have a qualified F-Gas certified engineer perform a full service. This covers refrigerant pressure checks, coil cleaning, electrical checks, and all the items that require specialist tools and qualifications. Attempting refrigerant work yourself is illegal without F-Gas certification.

What NOT to Do Yourself

• Never attempt to top up refrigerant — this requires F-Gas certification
• Don't attempt electrical work inside the control panel
• Don't clean the evaporator coil fins with a pressure washer (can damage fins)
• Don't chip ice from the outdoor unit — run the defrost cycle or call an engineer