Category: Ariston Fault Codes

The Ariston 612 fault code means the boiler has detected a fan-speed error. The fan may be rotating faster or slower than the speed requested by the boiler, or the PCB may not be receiving a reliable speed signal. The boiler may lock out because it cannot confirm that the fan and combustion system are…

The Ariston 101 fault code means the boiler has detected an overheat condition and stopped operating to protect the appliance. You may lose heating, hot water or both while the boiler remains locked out. Overheating commonly occurs when water cannot circulate through the boiler quickly enough. Possible causes include a faulty circulation pump, trapped air,…

Ariston SP1, SP2 and SP3 fault codes indicate that the boiler has experienced a problem while trying to ignite or maintain a flame. These codes are officially written as 5P1, 5P2 and 5P3. However, the number 5 can look like the letter S on some boiler displays, which is why homeowners often search for SP1,…

The Ariston 501 error code means the boiler has attempted to ignite but has not detected a flame. As a result, the boiler enters a safety lockout and may stop providing heating and hot water. The problem may be caused by a temporary interruption to the gas supply. However, repeated 501 faults can also indicate…