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Hi kev After shutting of the upstair RAds, the downstairs RAds started coming on slowly. Next day I also opened up the upstairs RAds and all RAds are now working. Some RADS neeed bleeding the air. The most Air was in Upstairs bathroom Radiator as it is the longest and highest RAds...

Hi I sorted out the cutting off problem after putting the MX400 which I left in the system for over 4 weeks. The system with all RADS on working fine for last 4 weeks. However today I drained the system to flush the MX400 and refilled it with fresh water. Initially the water would...

By the way after all the 3 plumbers visits and various expensive repair suggestions, I followed suggestion from Mike- Tech guy at Sentinel and put MX400 on 30/9/09. Within few days all RADs started getting hot and now I have also put the pump on number 2 position and it is not pumping over...

Although the second plumber (Paul) changed the 3 port MPV. He said it was faulty as RADS were coming on when only Hot water was on. However after changing the MPV, the RADs still came on this morning. So it seems he replaced the good working MPV with a new one and charged me £86 for new MPV...

Email Sent just now but will send you diagram may be on Wednesday going to bed now. Thanks .

Doitall Pumping over happened 7 to 8 years ago as far as I remember and the plumber a the time extended the vent pipe hire by 1.5 meter by making a loop as there was no headroom in the loft. The original vent pipe was only one foot above the F&E tank. I think all these years the pump...

What happens if you plug off the open vent. He said some people will say it will blow the boiler!

No. This is true. What part do you think is a joke?

Thanks doitall. First Plumber came at 11:00 am to give an estimate. He spent (free of Charge) one hour checking the electric connection near the pump and 3 port valve which he said were all fine. Afterwards he checked the boiler PCB circuit, thermostat etc. Then he asked me for the boiler...

See the 3 images. I think my system diagram looks like this one. The pump is on the 1st floor landing on bathroom side and next to it (6 inch away on box room side) is the 3 port valve Honeywell Sundial Y plan. From this 3 port valve one pipe (right side) is going to second bedroom...

Did you check the email I sent to your hotmail address? When the bolier is switched on (for 4/5 minutes, the pump is running but no hot pipe near the pump plus I can feel that the 3 port valve is also buzzing and hot but no hot water passing through. Your comments about the cold feed/open...

see the email sent to your hotmail address to disucss

If it is seized does it need to be replaced or cleaned? I do not mind spending £60 for valve plus labour if that solves the problem. However at the moment as you know the boiler is shutting off after few minutes. Is the seized valve causing boiler to shut off after few minutes?

Honeywell 3 position Sundial Y Plan

yes. They are both fine. Mike, the twgas ( BG Enginner) suggested that 3 port valve may have been seized. What is the solution? Do I need to replace the 3 port valve or does it need to be removed and cleaned, although this is not something that I would do myself!

Done that both valves were open anyway. I find that now when I turned on the bolier the pipe up to the pump is not hot. Any other ideas?

yes the valves on both side of pump are wheel type. You remove the wheel from one and fit on the other to operate. The wheels are removable

Valve is with the wheel

This could be the case. I will check. As the pipe upto and including the pump is hot but not after the pump and the 3 port valve! To open the valve, do you turn the valve clockwise (right) or anticlock wise (Left)?

I thought that when Engineer replaced the old pump with new pump, he would have checked this? I am not capable of removing the pump as I have a problem with my shoulder. If the cold feed is blocked, would draining the syem will solve the problem? I mean how do you remove the cold feed blockage?