I have a MHBF30LPT propane heater. Worked fine for 1.5 years then suddenly stopped. Replaced outside regulator with new one but no gas makes it to pilot burner when pressing the knob as required to light heater. Pipeline is clear, verified gas is getting to the unit. Any ideas what is wrong?
Heating & Cooling - Mr. Heater - MHVFB30LPBT BlueFlame Electric Wall Mounted Panel