Hot water pipe is hot but return pipe is cold. boiler is banging and heating is not getting very hot when on at all. It is an evo boiler. H/A9 flashes on display when heating does not come on at all. There is no H or A 9 in the instruction manual
2006-10-11 20:53:23 · 14 answers · asked by Anonymous in Home & Garden ➔ Maintenance & Repairs
Either the radiators are turned off at the thermostat control situated on each one (so no flow of water around system) or they have air in them and so need bleeding.
2006-10-11 20:59:52 · answer #1 · answered by Trevor h 6 · 0⤊ 0⤋
If the return pipe is cold, it may be empty, so the system may need to be refilled.
That would tally if the boiler is banging, it's heating fresh air most of the time, the banging is the water boiling, not good. It shouldnt get that hot.
It sounds like a closed system, so there should be a "filling loop", a way of getting water into the system. It may be a flexible braided hose and there may be a valve at both ends and guage not far away showing the pressure.
When the system is cold or nearly cold, fill it up by opening both valves. There'll likely be air in the radiators too, so you will need to bleed them with a bleed key on a square head on each radiator.
When you do this then the system pressure will go down, as the air goes out. You will need to replace this air with water to keep the pressure up as it is the pressure that pushes the air out. Best to check the pressure after each radiator check.
When each radiator appears to be full and the pressure is set, you can press go again and get warm
You cant have too much pressure it will spill out of the safety valve, but if that happens something is wrong. There should also be a springy lever that empties the excess.
Normally the pressure is about 1 - 2 bar.
By the way, the system fills direct from the mains, so to avoid contamination from the heating system, it's normally not connected permenantly, hence the braided hose.
If you havent a clue, print this out and get someone with more aptitude to help. Its not rocket science but...
Hope that helps
2006-10-11 21:22:52 · answer #2 · answered by davidcush2000 2 · 0⤊ 0⤋
In the first instance call the manufacturer and ask if the boiler is still under warranty - the manufacturer will call and give you an honest answer on what is wrong and if its within the boiler will repair free of charge. When you had the boiler fitted did the installer flush the system properly ?? If he didn't - and most don't - and you system is dirty this may have either clogged the pump and burnt it out and if the boiler is making kettling/banging noises it sounds like the heat exchanger is also blocked. If you get it repaired ask about having a strainer fitted to the return pipework which will avoid the same problem in the future. Good luck.
2006-10-11 22:56:08 · answer #3 · answered by starlet108 7 · 0⤊ 0⤋
If boiler is less than 1 year old contact installer.
If over a year, try the following......... Find the pump usually near the boiler, Remove the brass screw on the end of the body using a 2 p coin . Insert an electrical screwdriver into the slot so that you engage the slot of spindle, rotate either way, SHOULD START to spin and pump. If not replace pump .Have chemicals added to preserve the system (FERNOX) No chemicals mean black rust, which clogs the system.
2006-10-12 02:23:55 · answer #4 · answered by xenon 6 · 0⤊ 0⤋
I do not know the boiler, need more information.
Is it a combination boiler, does not sound like it so we will assume it is not
In which case it sounds like the pump, If you have not had it running in this condition for a long time (It will have burnt out the motor) it may respond to a gentle but firm tap. If not it will need replacing.
2006-10-11 21:00:11 · answer #5 · answered by philipscottbrooks 5 · 0⤊ 0⤋
sounds like all the radiators need bleeding start at the furthest away from the boiler and see if that works
2006-10-12 07:50:00 · answer #6 · answered by Reevo 1 · 0⤊ 0⤋
full of air bleed rads then top up with water at fill up point located just under the boiler
2006-10-15 06:55:25 · answer #7 · answered by lee b 1 · 0⤊ 0⤋
Have you checked the basics. i) The programmer is set to come on for heating as well as water (if not the valve may only be diverting hot water round the cylinder?) & ii) The room thermostat is set high enough to force the heating to come on to heat the room?
2006-10-11 21:02:41 · answer #8 · answered by madbrew2000 2 · 0⤊ 0⤋
Errr, call a plumber! Most plumbers will come out for free and quote, suggest you get it checked before the really cold weather sets in as you could have to wait weeks then as they will be mega busy.
2006-10-11 21:02:07 · answer #9 · answered by Annie M 6 · 0⤊ 0⤋
Call him back, for goodness sake. He should have left it in fully fuctioning condition - even if that means bleeding the radiators. He should have tested it before he left, which he clearly didn't. Call him back - you don't need to pay any more than you already have.
2006-10-11 21:05:10 · answer #10 · answered by Anonymous · 0⤊ 0⤋