Hi this is my first post so greetings to all.
I have a Raven-heat csi 85t, it is getting old but has provided many years of good service.
The problem is that there is no control over the hot water temperature.
Once the hot tap is turned on the temperature of the water increases until it reaches scalding point.
At the moment it is set to water only. I have changed both thermistors but this has not helped. I put a meter on the hot water potentiometer & the resistance changed as I turned it so I assume that is not the problem.
By the way I am not a heating engineer.
Any ideas what to try next? Thanks in anticipation.
I have a Raven-heat csi 85t, it is getting old but has provided many years of good service.
The problem is that there is no control over the hot water temperature.
Once the hot tap is turned on the temperature of the water increases until it reaches scalding point.
At the moment it is set to water only. I have changed both thermistors but this has not helped. I put a meter on the hot water potentiometer & the resistance changed as I turned it so I assume that is not the problem.
By the way I am not a heating engineer.
Any ideas what to try next? Thanks in anticipation.