HeatingForce is reader-supported. When you buy through links on our site, we may earn an affiliate commission. Learn more. This 3-minute guide will cover the most common Alpha boiler faults. So, where possible, we included problems that are common on these boilers specifically.
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Pump or flow problem, blocked heat exchanger, air in heat exchanger, overheat thermostat, thermal fuse if open circuit then replace primary heat exchanger. Blocked or restricted primary flow, heat exchanger air flow blocked, flue restriction, flue sensor fault. Check expansion vessel pressure 1 bar , leak in system, expansion relief valve operated or primary pressure switch.
Air in heat exchanger, blocked or restricted primary flow, heat exchanger air flow blocked, flue restriction, flue sensor fault, pump fault, boiler or heating circuit valve closed.
Blocked or restricted primary flow, air in heat exchanger, boiler or heating circuit valve closed, pump fault or primary flow sensor fault. Flame sensing electrode and lead, check flue gas recirculation, check the gas valve settings and check the fan speed settings.
Check gas supply working, check flame sensing electrode and lead, check for flue gas recirculation, check the gas valve settings, check the fan speed settings. External sensor and cable damaged or wet, continuity of external sensor and circuit, check connection at X19 on printed circuit board PCB and sensor connecting block. Air in heat exchanger, restricted primary flow, heat exchanger air flow blocked, flue restriction, flue sensor fault or pump fault.
Batteries need replacing, distance between boiler and climatic control too great, interference object blocking signal metallic. Pump operation may need to free the pump shaft , issue with pump wiring or pump replacement needed. Flow and Return valves may not be open, iIncorrect system pressure, system not purged properly or flow return valves are open.
Service reminder countdown has reached 0 this will not stop boiler from working — boiler needs servicing. Issue with air inlet manifold and pipe.
Damage or fault with fan. Fan wire connections. Air in the primary heat exchanger. System restrictions causing overheating. Flue run may have restrictions or blockages. Incorrect gas supply. Ignition electrode position and spark. Issues with flame sensing electrode gap and connections. Valve connection issues.
Main PCB. Gas valve operation issues. Gas contamination. Poor or incorrect circulation. External circuit influences. Problem with resistances of flow and return sensors. System circulation issues. System volume or flow is too high. Boiler output is insufficient for the system. Flow and return sensor anomaly detected. Sudden temperature change detected on the flow or return sensor. Problem with operation of zone valves.
Resistances and function of flow and return sensors needs checking. Insufficient system flow if the system flow is too low for a certain length of time boiler will switch off. Flow switch reading needs checking. Restrictions or shut valves in system. Pump function issues. System pressure issues.
System pressure needs to be 1 — 2 bar if its not the pressure needs refilling to the correct amount. Return sensor connections and damaged wires. Return sensor resistance values need checking. Flame sensing electrode connections need checking. Short circuit to the electrode or wire. Investigate initial fault code displayed. Electrical socket connection issues. Problem with external power supply.
Possible power disruptions. System needs checking for circulation and restrictions. System pressure and gauge needs checking. Pressure switch and connections need checking.
Electrical connections to display board need checking. Water ingress in connections. Damage to buttons or LCD screen. External flow sensor connections and wires need checking for damage. External flow sensor resistance values need checking to make sure they are between 5 and 0. External sensor connections and wires need checking. Boiler parameter settings are incorrect.
All electrical connections. Incorrect parameter settings on PCB. Rotate selector switch to the reset position 3 and the ignition sequence will restart after a delay of about 30 seconds. Contact a heating engineer. Flashing red A and Flashing red B and flashing yellow C. Flashing red A and flashing red B and flashing yellow C indicators. Check the gas supply, pressure tubes, ignition electrode, flame sensor electrode, ignition generator or lead flame sensor, gas valve setting and PCB.
Pump or flow problem. Caused by a blocked heat exchanger, air in heat exchanger, overheated thermostat, thermal fuse if open circuit then replace primary heat exchanger.
FREE BOILER MANUALS
Find the best boiler for your needs, or see how the latest A-rated boilers compare with each other and your existing one. Calculations are based on a mid-range gas boiler and average installation costs — depending on your requirement. The smarter way to find approved boiler engineers in your area. Try Boiler Guide today! See how we're operating during Covid Find out more. Get the best quotes, fast! Over 5, engineers across the UK Gas Safe registered engineers.
Alpha Alpha CD32C Manuals
For safety and economy reasons it is advised that your boiler should be serviced once per year. A cupboard or compartment used to enclose the boiler must be designed and constructed specifically for the purpose,i. All Alpha Innovation boilers are equipped with indicator A and B neons. Indicator neons should be used for basic fault finding.
Alpha Boiler Error Codes
The 6 Most Common Alpha Boiler Problems [And The Quick Fixes]