I know that it can be very frustrating to have issues with your grill. A single stage, high pressure regulator will expand the volume of the gas from a liquid state to a gas just before the point that the gas hose is attached to the propane regulator output. That change of state from liquid to gas requires a considerable amount of heat. The heat comes from the metal that surrounds the gas in that area. If the demand for the propane is very high, the metal gets noticeably colder and colder because it can't draw heat from the surrounding area fast enough. If the demand for gas is very high and there happens to be a high moisture content within the propane stored in the tank, the water vapor can condense and freeze up internally within the regulator (a cold metal enclosure) thereby block the flow of the propane to the supply hose. Check to see if the gas is injected some methyl alcohol (methyl alcohol acts as an antifreeze). The gas supplier should know this, but if not contact the wholesale propane gas suppliers. If you can not find gas that is injected, then occasionally pour some warm water over the propane regulator. Also try to keep the propane tank and gas regulator in a warm place. The colder the propane tank and gas regulator are, the more prone the gas regulator is to experience a freeze up. Lastly, keep a spare propane tank and be prepared to make a switch whenever you sense a decrease in the flow of the propane. Then allow the cold propane tank and regulator to warm up. The problem will be more pronounced with a less than half-full or near-empty propane tank, and occurs more frequently in a smaller propane tank than a larger propane tank. I hope this helps. If you need further assistance, please reply to this thread. Thank you for using Manage My Life.