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- 29 May 2007
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Good Evening Everybody.
In an earlier post I mentioned that the circulating pump in my central heating shattered internally and blocked the flow of hot water in the system.
The system overheated and the pressure control opened and emptied the water. However, damage was called to soldering joints etc. I replaced the pump and its associated valves.
The pressure control valve had to be replaced also - once it opened it refused to close.
Once i had repaired all the leaks, refilled and bled the sysytem, I attempted to fire it up.
The burner refused to start.
I traced the problem to the boiler thermostat control box. I have some experience in electronics and I found the temperature control portion was OK but the overheat control section is faulty.
I think that when the boiler overheated, the overheat control operated and cut the power to the burner. However, now at normal temperatures this control is still breaking the supply to the burner.
I feel that I may have difficulty in obtaining a replacement unit. If so, I was planning to modify the system.
I would like to canvass your opinions. I had the idea of of leaving the original unit in situ.
My plan is to bridge out the overheat section. The temperature setting section would then be still operational. I have a cylinder thermostat unit which bolts onto pipes. I planned to bolt this unit onto the 3/4 inch pipe coming out of the boiler. This unit would provide the overheat protection.
The existing unit and the cylinder thermostat would be connected in series.
I would be grateful for any suggestions that anyone can make.
Many thanks,
Jimmy
In an earlier post I mentioned that the circulating pump in my central heating shattered internally and blocked the flow of hot water in the system.
The system overheated and the pressure control opened and emptied the water. However, damage was called to soldering joints etc. I replaced the pump and its associated valves.
The pressure control valve had to be replaced also - once it opened it refused to close.
Once i had repaired all the leaks, refilled and bled the sysytem, I attempted to fire it up.
The burner refused to start.
I traced the problem to the boiler thermostat control box. I have some experience in electronics and I found the temperature control portion was OK but the overheat control section is faulty.
I think that when the boiler overheated, the overheat control operated and cut the power to the burner. However, now at normal temperatures this control is still breaking the supply to the burner.
I feel that I may have difficulty in obtaining a replacement unit. If so, I was planning to modify the system.
I would like to canvass your opinions. I had the idea of of leaving the original unit in situ.
My plan is to bridge out the overheat section. The temperature setting section would then be still operational. I have a cylinder thermostat unit which bolts onto pipes. I planned to bolt this unit onto the 3/4 inch pipe coming out of the boiler. This unit would provide the overheat protection.
The existing unit and the cylinder thermostat would be connected in series.
I would be grateful for any suggestions that anyone can make.
Many thanks,
Jimmy
