Recent content by storedpepper

Just an update. I bought a aftermarket actuator that didn't fit. It looked identical to the original but was 3mm deeper and wouldn't fit around the casing. So check the size if you have a alpha CD28C. The body needs to be 70mm not 73mm. I took the original apart and found that the brass push rod...

Pressure went up to about 1.6bar when CH running.

The actuator didn't move when hot water running but heating outlet was getting hot. So i turned the wall stat up and left it running. All rads now getting hot. I can push the actuator pin in, it's got a strong spring (i thought it would be just motor driven in or out) when the heating switched...

The actuator is dry but i will check it. Having a problem undoing the drain valve, see pic. It won't budge. It should just be 1/4 turn shouldn't it ? I'm now thinking i might damage seals in it if i try too hard. should i just drain down at radiator drain cock ?

The pin moves freely against the spring. I can feel it hit it's stop when pushed in and springs back ok. It was dry when i first looked at it then after depressing the pin a few times there was one small drop of water so I've ordered a repair kit.

Ian, I've run HW only and the return pipe for the central heating below the pump( NOT the flow) got hot . I don't know if that's normal as there will be hot water in the pump but i think it means the diverter is ok.

when the central heating is on there is no heat in the HW.

Do i have to remove the diverter to do that?

Is there any way to test/check for that Sammy?

I have thought diverted may be sticking half way, Is that common. Hot water is working ok.

First thought was air so i bled them all next thought trv's faulty so i took the heads off and made sure they were free. When bleeding the cold rads warm water,not hot, did come out. It's a bungalow so no upstairs. I'm pretty sure that when the heating came on before the pressure rose about half...

Pump runs, hot water going into central heating pipe, first 3 rads getting hot water but last 3 rads warm at the inlet but rads cold. Hot water is working ok. when the heating is on pump is running but only about an eighth of a bar increase in pressure. I'm thinking that there is not enough...