Protherm 40-50 Ci No Heating Or Hot Water

I was called to look at a system with a Protherm 40-50 Ci as the customers were getting no heating or hot water. When I arrived the heating and hot water were set to be on but there was nothing happening. After sliding the bottom tray off I could see an orange glow coming from the control box so I knew that the boiler was receiving power. The overheat reset button had not popped out on the front of the control box.

I asked the customer if the boiler had been behaving itself over the last week,and they said that it had been getting noisier. They described the noise as a loud whining. I opened the case and checked for power to the fan, which there was but it was not spinning. I replaced the fan and the boiler was working quietly and correctly again.

Disclaimer: The works described in this blog are a record of work undertaken and should not be taken as guaranteed to solve your problem. Work should only be carried out by persons qualified and competent to do so.