I have now changed circulation pump and all is working fine.
Whilst boiler was drained i have noticed that braided pipe connecting expansion tank , is full of small black particles. It is likely to be blocked but not sure as the other end of the pipe is behind boiler so cant be removed...
Thanks for advice I will try to find Wilo pump head. I can see many pumps on ebay but i never purchased spares on ebay before so this is perhaps first time !
Is there any other part that is worth changing or inspecting while I have bolier drained ?
Hi
Found some time to deal with this. Boiler still working but pump makes noise so I plan to replace. I did some research on what pump I need.
My ISAR HE30 has serial number starting with WN prefix so according to Ideal it should need pump head part No 170990. I have checked and pump in...
Thanks for response
How would I determine if pump head is faulty ? It seems to work in as much as it does circulate water arround the system and it moves. I can try to find new head for IDEAL , all the effort to remove it might be worh to replace head as you say.
Do I need new gasket when...
hi,
Seems another problem with IDEAL ISAR boiler. This time it is noise from the circulating pump. When CH water is circulating and pump operates I can hear grinding or knocking noise from the pump. It seems like something is stuck or hitting the propeler inside the pump. I have seen posts...
Air top up valave - I mean this is valve used to pump up air inside the expansion vessel.
There is no air inside rads , checked this.
Auto air vent also seems OK , when I was filling boiler , auto air vent was letting air out then stopped as water level raised. There are no water leaks...
Latest update
After hot water performance got so bad over on Saturday, got desperate so I have attempted to fix the problem.
I have followed advice and suspected Plate Heat Exchanger blockage.
Turned off power, isolate all valves, drained boiler , had to take out main PCB...
Thanks engineerman,
Is there any test to do before I start taking this part out ? It is right at the back so not even sure how easy is to remove. just want to make sure it is the faulty component.
I have found some posts , who claim to have cleaned this component. Does anyone here have...
Hi,
I have Ideal ISAR HE 30 boiler and have now lost hot water. Things were getting worse over the last few weeks.
When tap turned on hot water comes out for 20 seconds then temperature reduces to only slightly warm.
I have searched forum here, so I have suspected diverter...
I am still not happy with pressure changes in the system , when hot it does rise for 0.7 bar, from 0.7 to around 1.4 .
Is this within expected changes?
the system is only small for 2 bed flat so not huge amount of water i guess.
I need to check expansion cylinder perhaps ?
I have resolved the problem so just here to explain the detail.
I have used the transparent tube and air vent to blead air from HEX. This was not problem.
I have then identified that sump for the condensate is full again and after taking sump out I have noticed that plastic pipe under...
I have taken cover off the boiler and inspected what I can see.
All i have done was to clean sump for condensate ( this seemed to be full of what looked like sand ). Returned all back to it's position. I have opened screw at the front of the circulating pump , to let some water out. I have...