Oil Boiler Photocells

A oil boiler photocell is a safety device that monitors combustion flames. During the start-up process, an oil boiler photo cell first makes sure there is no stray light from a flame in the chamber and only then will the PCB allow the system to begin the next start-up phase to establish an ignition. Once lit, the boiler photocell monitors that it stays lit. If the signal to the PCB stops, the burner will become locked out from receiving any additional fuel. A boiler photocell can burn out or get glazed over with deposits. As a result, your boiler may not light or may not stay lit. A constantly running fan without an ignition is a common sign of a photocell issue; however, the precise symptoms will differ according to your boiler model. Photocell oil boiler problems can be hard to distinguish from solenoid, PCB or even motor and valve faults, but it is the cheapest and easiest part to eliminate by replacing it. Another common symptom that can be down to a boiler photocell fault is a burner that switches on and off too frequently. The water may still heat but the boiler will become fuel inefficient and your bills will start to climb. Regular servicing and photocell replacement will ensure your boiler stays both reliable and cheap to run. Gas boilers and oil boilers both use similar flame sensors; however, your photocell needs to be matched both physically and electronically with your particular model. If you are unsure which boiler photocell you need, our customer service team will be happy to check for you. When there is a choice of manufacturer, Riello is widely recommended.
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