Recent content by markio123

I changed a bathroom towel rad last year and basically oil coloured water came out the rad. So I removed every rad and jet washed them all through last summer, added a Fernox TF1 and added inhibitor. The problem I have now have was there last winter, I reckon a good chance its the non return...

Well he was kind out of ideas and that's all he could suggest. So I'm trying to understand what you say is an easy test, isolate the pump (I'm thinking on outlet side?) turn the hot water on with no central heating? What is supposed to happen if the non return is faulty? I probably got that...

So I've spoken to Grant technical. After describing what is happening they have suggested it is most likely the non return valve on the central heating pump that is causing the issue. I know the symptom should be some heat on the ch pump outlet pipe when no heating is being called for, I must...

So Friday evening last week after pressurising the boiler to 1 bar, during the night one of the breakers on my DB tripped out and would not reset. I went and checked the boiler , zero pressure and a whole lot of water in the bottom of the boiler and a damp jacket. Turns out the pressure switch...

Exedon thank you. So I need to drain down the boiler, drain plug behind burner. Remove the pressure switch, fit 1/4" BSP plug in its place, fit link wire where the sensor was wired into the main board Remove the auto air vent NOT the one on the store and replace with 3/8" radiator drain bleed...

snb1 I just had a look and didn't like what I found! The pressure this morning was not far off zero. There is a leak coming from the pressure switch, if I touch the plastic on the switch I get a mild electric shock if the boiler is running, it looks like its been leaking for some time as its...

snb1 I'll try that and see what happens, I thought that if a hot water tap was on somewhere then the 'flow' light would be on? Anyway there definetly no hot water tap on when I took the picture. The boiler was serviced last week and I was assured that the pressure was set to 1 bar, so on top of...

Exedon, Thank you for your reply. Please see below a picture of the PCB. Yes I understand that something is driving the demand for the hot water and hence the CH pump stops running. Of note is that demand for the DHW when the CH is heating is off is not apparent unless it just a quick blast to...

Boiler is a Grant Vortex Pro 21, installed around 6 years ago. When Central Heating is demanded from the thermostat the CH pump will come on for a couple of minutes say and then the CH pump is switched off and the DHW pumps starts, the flow light is not lit, this cycle continues varyingly. As a...