Why does my heating only work when hot water is satisfied, the motorised valve only opens when hot water is up to temp when I turn up cylinder stat valve shuts again. Worked ok for long enough wondering if its the synchron motor but it seems to open valve ok when hot water is satisfied.
- Thread starter Nick Cox
- Start date
- Replies 4
- Views 2K
- 3 port 3 port valve problem valve
Discuss 3 port valve problem in the Plumbing Jobs | The Job-board area at PlumbersForums.net
If it's a Honeywell System W or similar, with either/or diverter valve (not mid-position) that's how it's meant to work. How long is long enough? Maybe you didn't notice it all summer as CH wasn't being called.
OK, sounds like it could be an electrical problem with the valve. In case you don't have it, wiring diagrams below, showing both the overall system wiring and the valve internals. Might be worth trying clean the switch contacts. If it's not that, and it's getting the right voltages when it should, sounds like a replacement head needed.
It seems to be working as a W-plan. You could just leave it like that. I have a W-plan and I don't find the time waiting occasionally for CH due to HW preference is a problem. Maybe different if you use a lot of hot water.
Last edited:
Reply to 3 port valve problem in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Similar plumbing topics
Hi,
I have a Vailant EcoTec Boiler with a Megaflo. These are controlled by a Honeywell controller. I have one 3 port diverter, where one of the outputs goes to a 2 port diverter prior to the Megaflo (I believe this is some safety feature).
I have run into an intermittent problem where some...
Hi All,
Hope somebody can help :) I have a vented HW system with a pressurised Ch system but got bit of a annoying issue, when the hot water comes on all seems ok then after about 15/20 mins i started to hear a trickling noise from hw cylinder which i can also hear in the boiler. The central...
In our sealed Megalo system, when hot water tap is used (say in bathroom shower) the megaflo is taking in some fresh water, I guess to compensate for the water used. The incoming water go via a pressure relief valve [most likely its this one: Heatrae Sadia 8 Bar Pressure Relief Valve -...
Trying to find out exactly what happens when my system boiler is called to supply the radiators and hot water cylinder at the same time.
For example today, whilst the boiler was on heating the water, the room stat triggered the boiler to supply the rads. The diverter valve installed in the...
I've got a heating boiler which heats up the water in a tank located in a cupboard upstairs and then from there I get hot water & hearing. I get hot water ok but the heating doesn't come on when turning the thermostat to a higher temperature. I've got a 2 way motorized diverter valve which would...
- Mr Andrei
- Central Heating Forum
Creating content since 2001. Untold Media.
Newest Plumbing Threads
-
-
-
-
What constitutes a Commercial Appliance and thus a Commercial Kitchen?
- Started by FozzieBear
- Replies: 3
-
POTTERTON PROMAX 28 COMBI Boiler - Hot Water Issue
- Started by boiler101
- Replies: 4
-
Hole in copper pipe, solder under floor, T coupling & protection- Started by dreikher
- Replies: 0
-
-
-
-
-
-
-
-
-
Sewer pipe problems not sure about it- Started by sammie81116
- Replies: 3