I have high boiler pressure at 35 with no noticeable pressure venting, that’s probably a broke value and I don’t know how to reduce it.
You will need to find out if the pressure in the boiler is actually 35psi or is the gauge out of calibration. That gauge is called a "tridicator" that measures the boiler's water temperature and pressures. That gauge may need to be replaced. If you haven't had the unit serviced in 10 years it is time to call someone to have that unit serviced. According to the tag on the boiler as shown in upper picture left side, your boiler is rated at 30 psi and the relief valve, the bronze looking thing with the red tag in the bottom picture should have dumped all the water needed to drop the pressure to just below that 30 psi. If that relief valve is bad and frozen that could create a hazardous condition and should be replaced immediately. A good service company will service, clean, and test all the operating and safety controls and return the boiler to a safe operating condition. You are not saving money with a dangerous and inefficient boiler. my 2 cents
This boiler is not serviced well. Go to hardware store and buy guage with female hose attachment. Screw on drain and open valve. It will tell you how much to drain pressure.
Bad pressure gauge, replaced and system working good thanks guys.