Vokera A04 Fault Code: Causes, Fixes and Safe Checks
Vokera A04 Error Code: Low Water Level Causes, Safe Refill Steps and Repair Advice A Vokera A04 error code usually means the sealed heating circuit needs more water. In many Vokèra manuals, this warning appears when the level has dropped below the safe working range. This is not the same as an overheat fault. Instead, […]
Vokera A06 Fault Code: Causes, Fixes and Safe Checks
Vokera A06 Error Code: Tap Heat Sensor Meaning and Safe Repair Advice A Vokera A06 error code usually means the boiler has found a tap heat reading problem. On many Vokera models, this points to the domestic hot water NTC thermistor. This small part helps the control board understand tap demand. It also helps manage […]
Vokera A07 Fault Code: Causes, Fixes and Safe Checks
Vokera A07 Fault Code: Flow Temperature Sensor Meaning and Safe Repair Advice A Vokera A07 fault code usually points to a problem with the primary flow temperature reading. In simple terms, the boiler cannot trust the signal from the heating flow thermistor. This part helps the appliance monitor water as it leaves the heat exchanger […]
Vokera A08 Fault Code: Causes, Fixes and Safe Checks
Vokera A08 Error Code: Return Temperature Fault, Causes and Safe Repair Advice A Vokera A08 error code usually points to a return temperature reading problem. In many cases, it relates to the return NTC thermistor. This part monitors water as it comes back from your radiators. The appliance then uses that reading to manage heat […]
Vokera A09 Fault Code: Causes, Fixes and Safe Checks
Vokera A09 Error Code: Flue Temperature Warning, Causes and Safe Repair Advice A Vokera A09 error code usually points to a flue temperature or flue sensor issue. On some Vokera controls, it can also appear as a service reminder or heat exchanger cleaning warning. This code should not be treated as a false flame fault. […]
Vokera A41 Fault Code: Causes, Fixes and Safe Checks
Vokera A41 Error Code: Fill Warning, Safe Top-Up Steps and Repair Advice A Vokera A41 error code usually means the sealed heating circuit has dropped below its safe working level. On many Vokera models, A41 acts as an early “fill the system” warning. This warning should not be confused with a return probe fault. Vokera […]
Vokera A77 Error Code: Causes, Fixes and Safe Solutions
Vokera A77 Error Code: Low Limit Thermostat Warning and Safe Next Steps A Vokera A77 error code usually means the boiler has detected a low limit thermostat problem. On some Vokera models, this warning appears when the safety circuit does not give the expected signal. This issue is not normally linked to the fan. Instead, […]
Potterton E20 Fault Code: Causes, Fixes and Safe Solutions
Potterton E20 Error Code: Temperature Signal Fault and Safe Next Steps The Potterton E20 error code usually points to a problem with temperature feedback inside the heating circuit. On many Potterton boilers that use this code group, it relates to the central heating NTC thermistor. This part tells the boiler how warm the heating water […]
Potterton E28 Fault Code: Causes, Fixes and Safe Solutions
Potterton E28 Error Code: Flue Temperature Warning and Safe Next Steps A Potterton E28 error code often means the heating unit has found an unusual flue temperature reading. In many Potterton models, this points towards the flue thermistor or the circuit linked to it. This small temperature part monitors gases leaving through the flue. If […]
Potterton E40 Fault Code: Causes, Fixes and Safe Solutions
Potterton E40 Fault Code: What It Means and What to Check First A Potterton E40 error code usually points to a return temperature reading problem. On Potterton models that use this code family, it often relates to the return central heating NTC thermistor. This small part monitors water as it comes back from your radiators. […]
Potterton E78 Error Code: Causes, Fixes and Repair Advice
Potterton E78 Fault Code: What It Means and What to Check First A Potterton E78 fault code often points to a reading problem linked to the boiler’s water sensor. It does not always mean the gauge is low. Instead, the boiler might not be reading the sealed circuit correctly. Because of this, you should treat […]
Alpha E25 Fault Code: Causes, Fixes and Safe Checks
Alpha E25 Fault Code: Meaning, Safe Checks and When to Call an Engineer The Alpha E25 fault code needs careful model checking before you assume the cause. On Alpha E-Tec, E-Tec Plus and Evoke models, manufacturer fault tables link E25 to the PCB or main control board. Therefore, it should not usually be treated as […]
