What must the boiler pressure be like when the heat is on? Mostly, if not all, the pressure gauges have the colored markers for those unsafe and safe states of the pressure within the appliances. Ideally, when a boiler is on, a pressure must be amid 1, 5 up to 2 bars, then, when it is not functioning, it is 1 up to 1.5 bars. Normally, the safe levels of a pressure are being marked in green, while the too high or the too low pressure is being marked in red.
- Those people that had their boiler previously service by those “cowboy” heating engineers who had done them a poor work, and this will cause a unit to fail.
- People who have missed the yearly boiler servicing;
- Those people who didn’t assessed how much of water the main heating system need, which results in the faulty boiler processes;
Why is the boiler pressure rising too high from 2-3 bars?
Watching the pressure gauge to reach or to above 2 bars are already the clear sign that there is really something that is not right. There’re some things that will cause high pressures in the boiler:
- The latest boiler re-pressurizing – when you have recently performed this despite of the reason, a pressure will may have been estimated wrongly and therefore now it is rising.
- Packed with water – much water in your system will cause an increase in pressure.
- Faulty parts – despite of whether the appliances are brand new, there are some parts that can stop working partially or altogether and that will lead to the pressure increase.
- Boiler lifetime – to those units of about 10 years or even more or close to that, it is the usual issue. The boiler losing pressure, going too low or too high will be the cause of the problem made by the appliance age or as your appliance matures.
What happens when the boiler pressure had been too high? Will the boiler explode?
What is the worst that can happen if the boiler pressure is really high? The unit will start leaking or there are some internal elements that will be damaged, so it is not really a minor problem, the one you must overlook. When the pressure problems arise, then, call your professional boiler repair and inspection.
The manufacturers are making modern boilers to survive the high pressure and lots of units must be safe, but, on rare situation the boiler explode if it is old and you had neglected it for such a long time. Most of the modern heating systems had the pressure relief valves; however, you should not depend on that. The high pressure is barely the cause for the boiler explosion; however, different other reasons like the faulty internal parts will cause it.
Here are what can decrease the boiler pressure:
- Drain an overfilled main heating system
- Bleed radiators so it releases airlocks
- Replace defective valves or tightened up
- Troubleshoot boiler problems, if any
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