If it feels warm at the bottom and colder towards the top, your radiator might need bleeding.

Bleeding Radiators

Symptoms:
- Radiators are warm at the bottom but cold at the top.
- Radiators are noisy.

Tools Needed:
- Radiator key (or flat-head screwdriver for some models)
- Cloth or small container to catch water

Steps:
1. Turn off the Heating System: Ensure the heating system is off and the radiators are cool to the touch.
2. Locate the Bleed Valve: This is usually at the top of the radiator.
3. Insert the Radiator Key: Turn the key anti-clockwise until you hear a hissing sound (air escaping).
4. Catch the Water: Once the water starts to escape, close the valve by turning the key clockwise.
5. Check Pressure: If you have a pressurised system, check the boiler pressure gauge and top up if necessary.

Symptoms:
- The heating system is not working efficiently.
- The boiler shows an error code related to low pressure.

Tools Needed:
- None

Steps:
1. Locate the Pressure Gauge: This is usually on the front of the boiler.
2. Check the Reading: The needle should be between 1 and 1.5 bar when the system is cold.
3. Top Up the Pressure: If below 1 bar, find the filling loop (usually a small tap under the boiler) and open the valves to allow water to enter the system until the needle is in the correct range. Close the valves afterwards.

You can try resetting the Boiler.

Symptoms:
- The boiler is not working and shows an error code or is in lockout mode.

Tools Needed:
- None

Steps:
1. Consult the Manual: Find the specific reset instructions for your boiler model. If you don't have them, take a look in the CCS Download section.
2. Press the Reset Button: Usually located on the front panel of the boiler. If there is no reset button, try turning off the power at the nearby isolation switch and leaving it off for 1 minute. Turn the power back on.
3. Wait for the Boiler to Restart: This may take a few minutes.

If your problem persists, you should call CCS to book an engineer visit.

Checking power supply or Replacing Thermostat Batteries

Symptoms:
- The thermostat is not displaying anything or is unresponsive.
- Heating does not turn on or off as expected.

Tools Needed:
- Possibly new batteries (usually AA or AAA)

Steps:

1. Check that you have power in your home and that all the fuses are ok and nothing has tripped. If no issues are found, move on to step 2.
2. Locate the Thermostat: Remove it from its wall mount if applicable.
3. Open the Battery Compartment: Replace the old batteries with new ones.
4. Reinstall the Thermostat: Ensure it’s securely back in place.