This boiler issue has been a nightmare. Ideal's engineer, confirmed today that the gas valve had already been replaced on the last visit, so it was in place when I had the boiler last serviced.
He measured the gas pressure with a digital gauge, showing 28 mV at the boiler and sometimes up to 48 mV at the meter—very high, just like what I reported a year ago.
SGN came to check as well, using a water gauge, and found 27 mV at the meter (acceptable) but 65 mV on the gas main, which is high. Apparently, high pressures like this are common in new builds with IGTs. They even replaced the governor as a courtesy, though they didn’t see anything wrong with it.
Now it feels like a blame game: Ideal says water gauges are inaccurate, while SGN claims digital meters are unreliable. Meanwhile, I’m left with this issue and a boiler warranty that’s almost expired.
The SGN engineer mentioned that if the house pressure really were 27-28+ mV, there would be noticeable effects, like bigger flames on the gas hob. Not sure if that’s accurate, but I feel stuck in a loop with each company passing the blame.
Ideas?
