MY system is supposed to heat 15 radiators over 3 floors and has never been fantastic since we moved in but did manage to heat up at least half of the rads. Recently more of the rads stopped working and a plumber/ heating engineer suggested a block due to sludge.
He started by shutting off all rads then went round the house opening one at a time bleeding it and then running the pump at the highest then lowest and highest settings. This didn’t help so he put sludge remover into the system, drained the system then bled each rad . This stopped all of the rads working.
He suggested the pump or the 2 zone valve wasn’t working so we called in Brit Gas since they had installed the system.who replaced the front part of the pump and told us we needed a power flush and a new boiler.
3rd company, suggested one of the 2 port valves was stuck, when this was replaced they suggested the pump again. The system set up is as follows:
- Glow worm Hideaway 100B boiler
- Grunfoss Pump
- 1 Drayton 2 Zone Valve & 1 Appliance Components valve
We have piping hot hot water but no heating (only one of the upstairs rads get warm but not hot)
Before the flow pipe enters the Drayton valve, it has 1 branch pipe running to the top floor rads and another tap off for a bypass. When heating is switched on, the valve opens and hot water runs along the pipe for about 3 feet before it starts to get cold and within a few mins the entire pipe above the valve is cold- even though the valve is open. The top floor pipe gets warm but never piping hot. Another pipe coming from the H/W cylinder and running to the overflow on the roof gets piping hot almost immediately.
Sorry for the length of the post but I wanted to give as much info as possible. Also I’ve read most of the Q&As on the forum and tried a few of the suggested tips.
Thanks for any help you can give.
He started by shutting off all rads then went round the house opening one at a time bleeding it and then running the pump at the highest then lowest and highest settings. This didn’t help so he put sludge remover into the system, drained the system then bled each rad . This stopped all of the rads working.
He suggested the pump or the 2 zone valve wasn’t working so we called in Brit Gas since they had installed the system.who replaced the front part of the pump and told us we needed a power flush and a new boiler.
3rd company, suggested one of the 2 port valves was stuck, when this was replaced they suggested the pump again. The system set up is as follows:
- Glow worm Hideaway 100B boiler
- Grunfoss Pump
- 1 Drayton 2 Zone Valve & 1 Appliance Components valve
We have piping hot hot water but no heating (only one of the upstairs rads get warm but not hot)
Before the flow pipe enters the Drayton valve, it has 1 branch pipe running to the top floor rads and another tap off for a bypass. When heating is switched on, the valve opens and hot water runs along the pipe for about 3 feet before it starts to get cold and within a few mins the entire pipe above the valve is cold- even though the valve is open. The top floor pipe gets warm but never piping hot. Another pipe coming from the H/W cylinder and running to the overflow on the roof gets piping hot almost immediately.
Sorry for the length of the post but I wanted to give as much info as possible. Also I’ve read most of the Q&As on the forum and tried a few of the suggested tips.
Thanks for any help you can give.
