why does my central heating system lose pressure

If you suddenly find yourself without hot water, one of the first things to check is the water pressure. There should be a pressure gauge on the front of your boiler, although you may sometimes need to remove a panel to view this. A boiler should normally have a water pressure of between 1-1. 5 bar. If the pressure drops much below 1 bar you wonвt get any hot water. If this is the case, the first step is to repressurise the system by adding more water back in, which is usually done with a key, button or switch depending on the type of boiler. Please refer to your manufacturerвs instructions for guidance on how to do this or, if you no longer have these, contact the manufacturer directly with the make and model of your boiler. If your system keeps losing pressure, however, even after you have repressurised it, there is likely to be a more fundamental problem that will need addressing. The following are the two most common causes of lost pressure and how to spot them. Leaks If your central heating is losing water pressure that usually means it is losing water. This could be due to a leak somewhere in the system, which is not only bad for your water pressure, in could end up causing damage to your home. The best way to identify a leak is by checking all parts of your system, including all pipe work and radiators. Places where different parts of your system are connected together are the most likely culprits, so make sure to check anywhere pipework meets or is joined to a radiator, including all of your valves.


Itвs also work carefully checking over your radiators as these can sometimes develop leaks anywhere on their surface due to corrosion. Bear in mind that even if you canвt see any evidence of water leaking, it could still be happening in places you canвt access, like under the floor. It is still highly recommended, therefore, that you contact a reliable plumbing and heating engineer at the earliest opportunity. Faulty pressure release valve The other thing to check is that there is no issue with your boilerвs pressure relief valve (sometimes called the overflow). This will generally be connected to a pipe leading from your boiler to the outside of your house. Once youвve identified where this pipe is, check to see if it appears to be dripping regularly. If this is the case it may be that the valve is faulty, causing it to allow a small but continuous flow of water out of your system. Over time this will lead to the water level in your system dropping significantly and causing the overall water pressure to drop. This means that every time you repressurise the system, the water you add will simply leak out again, causing it to slowly depressurise. Ultimately, whatever is causing your boiler to lose pressure, if it keeps happening the problem is only likely to get worse over time.


The longer you leave the problem, the more like it is to result in even bigger problems, including the possibility of a complete boiler breakdown. So if your boiler is constantly losing pressure it is vital that you get it checked as soon as possible by a competent engineer. DHS offer first-rate and the surrounding area, so if you are having issues with your system, please donвt hesitate to get in touch. Remember, it is usually cheaper to fix a problem the sooner you identify it and call in help. Call DHS today onВ 0117 924 7200,В
В us,В orВ. My Boiler Keeps Losing Water Pressure Help! Does your boiler or central heating keep losing water pressure? Heres a handy guide to help you try to resolve the problem yourself, with your own boiler. Does your boiler or central heating have a problem with losing pressure? Is your boiler constantly losing pressure? Weekly, daily or even hourly? Is your boiler making strange, worrying or frightening noises? Does the boiler keep giving you fault codes to re-pressurise the system? Does the low pressure light keep coming on? Is the heating not getting up to the temperature you set? Is the central heating or hot water (or both) not working as they should be? Does the pressure keep rising, then drops to nothing? Does your pressure gauge keep going down? Please try to not worry too much about this problem if you attempt to resolve your boilers pressure loss yourself and find that you need expert help instead, it can be resolved by an AHP Boiler Services gas-safe registered heating engineer.


Were only a. Find your fill valve, then re-pressurise your boiler system to 1 Bar - this should get your system up and running again. Check the boiler manufacturer's instruction manual, left with your boiler (or look online). This should give full instruction on how to refill the system. If you cant find or locate your boiler manual, contact us. Well be more than happy to assist either over the phone or via appointment with a service engineer. Important note: its bad for the boiler if you keep replacing the water. This could lead to other parts of the boiler needing to be replaced. Check the safety discharge pipe work for leaking OUTSIDE the property. There is a safety discharge pipe that lets water out of the boiler, if there is a problem with the boiler becoming over pressurised. It will begin to drip or run with water. This is called the Pressure Relief Valve Discharge Pipe (or commonly called the P. R. V) Its a small pipe, which can only be seen on the outside wall of where the boiler is installed. Heres what it might look like outside your house. Some customers refer to this as the Boilers Overflow Pipe: If your pressure relief valve is leaking, it could mean that you have one (or more) of the following problems.


P Problem: Your Pressure Relief Valve needs replacing - its become weak on holding back the pressure. Remedy: Install a replacement P. R. V. Problem: Too much pressure has been put into the system. You could have a pressure gauge thats not giving a correct pressure reading and now, due to over-pressurisation, the pressure relief valve (P. R. V) is faulty and needs replacing. Remedy: Install a replacement P. R. V and possibly a new Pressure Gauge. Problem: A faulty filling valve is not shutting off correctly, so the water pressure is getting too high in the boiler. Remedy: Install a new Filling Loop or Filling Valve. Problem: Theres oxide sludge in the system which has damaged the Pressure Relief Valve (P. R. V. ) Remedy: P and install a new P. R. V. Problem: If the expansion vessel, which allows the systems water to expand, is faulty, the pressure will rise dramatically when the boiler is running. The P. R. V. will then automatically keep dumping the water in the system to the outside. Remedy: Install a new Expansion Vessel and a new P. R. V. If youre unable to resolve the low water pressure problem(s) with your boiler, dont despair! AHP Boiler Services have skilled gas-safe engineers that can be with you the same day to give you a no-obligation quotation to repair these problems, with a guarantee on all works. Book your appointment by. Alternatively, find out more, take a look at ourP or read our.

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