Boiler 4.5 years old. The pressure has started fluctuating from .5 when cold to 2.5 when hot. There are no signs of leaks anywhere. Is this a problem with the expansion vessel or possibly the pressure gauge?
Dave pretended :
Most likely the pressure vessel. Have you checked the air pressure on the PV? No air would mean the pressure would rise as you describe.
Yes, See SealedCH FAQ.
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.