Viessmann Appliance Repair in Duryard and St James

What does error code 30 mean on a Viessmann boiler?

Error 30 on a Viessmann boiler indicates the boiler water temperature sensor has short-circuited. Do not attempt to operate the boiler. Contact a Gas Safe registered engineer to replace the sensor.

What does error code F4 mean on a Viessmann boiler?

Error F4 on a Viessmann boiler indicates no flame was detected during ignition. Check your gas supply is on and other gas appliances are working. Press reset once. If the fault continues, contact a Gas Safe registered engineer to inspect the gas valve, electrodes, and burner assembly.

What does error code b0 mean on a Viessmann boiler?

Error b0 on a Viessmann boiler indicates the flue gas temperature sensor has short-circuited. The burner will be locked out. Contact a Gas Safe registered engineer to inspect and replace the flue gas temperature sensor.

What does error code A4 mean on a Viessmann boiler?

Error A4 on a Viessmann boiler indicates return temperature is too high or the burner is blocked due to an airlock. Check all radiator valves are open and the circulation pump is running. If the fault persists, contact a Gas Safe registered engineer.

What does error code EB mean on a Viessmann boiler?

Error EB on a Viessmann boiler indicates a heating water flow rate issue during calibration. The flow switch may have caused shutdown. Check all radiator valves are open. Contact a Gas Safe registered engineer to inspect the flow switch and circulation pump.

Do heat pumps need planning permission?

Most air source heat pump installations do not require planning permission, but it is advisable to check before starting the process. Planning permission is required for listed buildings and homes located in conservation areas and World Heritage Sites.

How do I repressurise my boiler?

Switch off the boiler and allow it to cool. Locate the filling loop and pressure gauge. Open both filling loop valves to allow water into the system while watching the gauge. Allow water to flow for approximately 10 seconds until pressure reaches 1.5 bar, then close both valves fully. Restart the boiler and check the pressure remains stable.

Do heat pumps use a lot of electricity?

Heat pumps use electricity, but because of their high efficiency, they produce more heat energy than they consume in electricity. For an average home requiring 12,000 kWh of heat annually, a heat pump with a CoP of 3 would use approximately 4,000 kWh of electricity. Combining a heat pump with solar panels can reduce running costs by up to 40 per cent.

Can a heat pump replace my gas or oil boiler?

In many cases, yes, a heat pump can provide all the heating and hot water you need for your home. Where hot water is needed at higher temperatures than the heat pump can achieve, an electrical heater element may be used to provide the final few degrees of heating.

What temperature should my hot water cylinder be set to?

Your hot water should be set to a minimum of 60°C on a hot water cylinder. This temperature is important for killing harmful bacteria such as Legionella. On a combi boiler, hot water temperature is variable and depends on your preference.