my pipes have an airlock in them, how can i fix it so my boiler stops cutting out?

Question

tried the engineers but they have not fixed it. need a way to do it myself. the boiler cutting out all the time is really annoying. they bleed the system but the airlock is still in there. how did it get there. can u help?

Answer 1

1/Switch off the central heating .
2/ starting with the radiator the furthest away form the pump
open the valve and bleed each radiator until all the air is
out of the system.

are you sure its not a faulty heat exchange unit?

Answer 2

You didn't say what type of boiler you have, wether it is a combi or balanced flue. What you have to do, is to see if you have a drain off point somewhere at ground level. If you have, connect a hose pipe to it for the water to run outside.Now, this is a slow process, but it should clear the airlock.If you have a combi boilerhave someone to keep the water pressure topped up as you drain water out.Turn all your radiators off at both ends except for the one nearest to the drain off. When you have done that, open the drain off and letthe water run out until it feels hot. When it is hot, turn off that radiator at both ends, and open both valves on another radiator and do the same as the first rad. When you can feel hot water close both valves on that rad. Proceed like this until you have done all the radiators. then open all the rad valves and see if there is an improvement. Keep your boiler going whilst you are doing this, but make sure you maintain the boiler pressure all the time. If it is not a combi boiler, then you don't have to keep a check on the water pressure.

Answer 3

The statement that they bleed the system , and the air lock is still thier . Leads me to believe this is a steam boiler , firetub in nature feeding radiators. If this is correct ? the problem will be a check value at the condincate tank. the value is stuck closed , should be at the bottom of the tank on the return side to the boiler. causeing the low water cutoff swith to shut down the boiler , watch the sight glass to see if the water level drops rapidly as the boiler comes up to normal pressure. This will be a sign of bad check value. If the level don't drop then it is possible a bad low water cuttoff swich.

Answer 4

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RE:
my pipes have an airlock in them, how can i fix it so my boiler stops cutting out?
tried the engineers but they have not fixed it. need a way to do it myself. the boiler cutting out all the time is really annoying. they bleed the system but the airlock is still in there. how did it get there. can u help?

Answer 5

Central Heating Airlock

Answer 6

Airlock In Heating System

Answer 7

without knowing what type of system you have it is difficult to give a accurate answer.

i spent 5 years designing industrial piping and recall that as a rule you need a drain at ALL low points and a vent at ALL high points. Sounds like your system might not have been designed properly.

You may have a high point that is not venting properly and the quick answer might to to simply cut in a vent in at that high point to bleed out the air as you charge the system.

Answer 8

Give it a good shake before using, prime it a few times then get her to adopt the missionary position and this should stop her cutting out. If this does not work then ensure all fluid is secreted before use and all passageways are clear.

Answer 9

dead simple just bleed your radiators until you have purged the system then top up boiler. you could also check in hand book if your boiler is self venting

Answer 10

Turn the heating off and in turn, bleed all the radiators independently starting with the lowest and finishing with the one in the highest position in the house. If that don't solve it, contact a registered plumber or corgi man