For the last few weeks I noticed that my central heating and hot water was staying on even though my programmer was saying it was off. I checked everything and the only way to turn the boiler off was at the mains! The programmer in question was a Potterton EP2002 and was approx 12 years old. Upon reading some comments on this site I took the advice and purchased a new EP2 programmer. It was very simple to install but I am still having the same issue! Any ideas, greatly welcome?
Issue with Potterton EP2 programmer
- Thread starter JimbobFrost31
- Start date
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Which boiler do you have?
Is it in the garage or somewhere similar?
How many motorized valves do you have?
Is it in the garage or somewhere similar?
How many motorized valves do you have?
The boiler is a Potterton Suprima and is in the kitchen. As for valves, im afraid youv'e lost me?
So it won't be a frost thermostat causing the problem
You will normally find any valve(s) in the airing cupboard with the HW cylinder.
They will look similar to one of these. Tell us which, and how many.
View media item 5946 View media item 11762
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There is one T junction style. I thought the tank in the airing cupboard was an emersion heater so its switched off. Have I been a complete idiot?
The water in the cylinder is normally heated via a copper coil, through which the boiler water can pass. The motorised valve can send the boiler water to the cylinder or the rads or both at the same time.
The electric immersion heater is just a standby, so it's OK to turn it off.
There are several possible causes of the problem.
Mid-position valve operation and fault finding should help you sort it out.
You are right! The problem seems to be with the mid position actuator sticking. It is very stiff! I will pop out in the morning and get some lubricant. Ill keep you posted!
Big thanks, all sorted now!
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