- Nov 29, 2009
- 208
- 72
- 28
- Member Type
- Heating Engineer (Has GSR)
Evening All,
I've got a new customer who's moved into the house that Jack built. No sooner have a replaced the illegal flue than the 5 year old Promax has developed dhw problems. It was your classic blocked phex so I replaced it. Then it started making an horrendous noise so on Baxi's advice I stripped all the brass off and descaled them. When I reassembled it the heating went off too. So now it's kettling on both heating and dhw despite a new plate and a good clean. The pump is spinning, I have continuity on the overheat thermostat. There's obviously a blockage somewhere. Has anyone any ideas? If it's a blocked main heat exchanger how would I clean it? Any advice appreciated.
Jock
I've got a new customer who's moved into the house that Jack built. No sooner have a replaced the illegal flue than the 5 year old Promax has developed dhw problems. It was your classic blocked phex so I replaced it. Then it started making an horrendous noise so on Baxi's advice I stripped all the brass off and descaled them. When I reassembled it the heating went off too. So now it's kettling on both heating and dhw despite a new plate and a good clean. The pump is spinning, I have continuity on the overheat thermostat. There's obviously a blockage somewhere. Has anyone any ideas? If it's a blocked main heat exchanger how would I clean it? Any advice appreciated.
Jock
