So the system is a Potterton Profile 80e and its over heat cut out was tripping daily. Its never had anti corrosion stuff in it so based on advice from this forum decided to work through the potential causes in the following order:
1) drain system
2) replace pump
3) put in some DS40
4) refill
5) run for a week
6) drain and use neutraliser / reflush etc
7) put in water treatment
8) if problem persists replace over heat and or boiler temp sensor
During the fill with DS40 stage i mixed DS40 with 1/2 gallon of warm water in a bucket and poured it carefully using a spout into the feed pipe in the FE tank (which was empty). There was some DS40 not properly dissolved into the water and I shook it out but some missed the spout and landed in the base of the FE tank then probably roused some of the sludge which lies there - silly error!
Turned back the cold on again to fill the heating system and then bled the rads - so far so good. There was lots of serious gurgling in the heating system (which not seen on other previous occasions when its been refilled when rads were added a few years ago) for the next day and so far the overheat has not tripped again.
However, all the hot taps give green / brown water! Cold is fine. I thought that the FE tank only feeds the heating circuit so why is the HW a funny colour?
1) drain system
2) replace pump
3) put in some DS40
4) refill
5) run for a week
6) drain and use neutraliser / reflush etc
7) put in water treatment
8) if problem persists replace over heat and or boiler temp sensor
During the fill with DS40 stage i mixed DS40 with 1/2 gallon of warm water in a bucket and poured it carefully using a spout into the feed pipe in the FE tank (which was empty). There was some DS40 not properly dissolved into the water and I shook it out but some missed the spout and landed in the base of the FE tank then probably roused some of the sludge which lies there - silly error!
Turned back the cold on again to fill the heating system and then bled the rads - so far so good. There was lots of serious gurgling in the heating system (which not seen on other previous occasions when its been refilled when rads were added a few years ago) for the next day and so far the overheat has not tripped again.
However, all the hot taps give green / brown water! Cold is fine. I thought that the FE tank only feeds the heating circuit so why is the HW a funny colour?