shulenin.there really is a risk of explosion are when the water is not just heated and turns into steam. very high pressure is required, minimum. but the emergency valve is not working, the special cut-off thermostat is not working , the thermostat itself, which here sets our temperature, has failed. temperature sensors usually do not allow the steam inside the boiler to heat up to a critical temperature, but they can fail over time, and from the valve, which is responsible for relieving excess pressure. users themselves often get rid of it; it begins to leak even during normal operation of the water heater, or drips or there is just a little trickle, the jar, and even this gets boring, removes the jar, removes this valve, everything, then we wait, sergey and evgeniy for our experience violated all the instructions, removing the protection that the manufacturer installed at the factory, in theory the boiler should warm up until it explodes. we filled it out. half, so there was plenty of space f