Hi - I've got a MAIN combi 24HE boiler which seems to be playing up and not sure what to do ...When not on the pressure reads 0When I put the radiators on the pressure doesn't even rise but the boiler makes a strange hissing sound that it never used to. Incidently the radiators seem to work absolutely fine (with the exception of 1 which is cold at the top quarterAny advice?
i assume once you communicate with regard to the rigidity alleviation valve you propose the filling loop? it is going to be under the boiler in many circumstances black lever and steel braided pipe - to precise up the boiler rigidity turn it anticlockwise and supply up once you get to a million.2 bar you will pay attention the water suffering via in case you don,t then your mains water rigidity is below the mandatory rigidity to get into the boiler. Is your chilly water from kitchen faucet extremely extreme rigidity if no longer then a combi don't have been equipped. attempt filling the combi at a time whilst maximum each physique is dozing then you have the excellent rigidity obtainable remember whenever you precise up the combi severely you will would desire to bleed the rads to get the air out and then precise it up lower back if the rigidity has long gone down.
The should be a tap on one of the pipes below the boiler.Try turning it a little bit, if it makes a sound of running water you should see the pressure dial moving up. Take it to 1 and a half. just search for those little taps and listen for the Hiss. All the best
im not an expert, got a Baxi combi boiler. Think pressure is meant to be between 1 and 2.5. below 0.5 you are meant to contact service engineer. Mine drops too but every few days i check it and if its too low i just release the pressure by turning the little black valve underneath it, the pressure rises straight away. Also have you tried bleeding the radiator that is cold at the top to see if it makes a difference.
You need to refill the boiler by opening the filling loop on the boiler until the water gauge reads 1 and a half bar of pressure, then close the filling loop. If the pressure then drops back to zero, you have a faulty water pressure valve which needs replacing. The water pressure is running out of the overflow pipe instead of being held in the system. As the boiler heats up the system, the water gauge will increase in pressure, but this is normal. AS water heats up it expands, and so the expansion will show on the gauge. Remember also that you have a closed system, so every time you lose water by bleeding rads, you have to refill the boiler to the correct pressure. Good luck.
