Springs and Diaphragms The purpose of the regulator is to control the high-pressure gas that exits the propane tank and reduce it to a safe level. This is done by the force of the spring against the diaphragm to exert a back pressure. This back pressure retards the flow of the high-pressure gas in the tank.Click to see full answer. Furthermore, how do I know if my propane regulator is bad?Signs of possible problems with a propane gas regulator or appliance include lazy yellow or orange flames; a popping noise when turning a gas burner off or on; flames floating above burner ports; roaring noises from burners; flames at the burner air intake; flames spilling out of the burner; and heavy deposits of sootSimilarly, why do I need a two stage propane regulator? Second stage regulators function to further decrease pressure to a usable level for appliance demand. These regulators work with the lower pressures delivered by first stage regulators and in turn, lower the pressure even more so that the propane will adequately and safely supply the demand of the appliances. Besides, how do you fix a propane regulator? Resetting it? Turn off the gas at the propane tank. Disconnect the hose from the propane tank. Open the lid of your BBQ Grill. Turn all the burner valves to high. Wait for 2 minutes (just time enough for a soda) Turn off all the burner valves. Connect the gas line back up to the propane tank. Turn the gas on slowly on the propane tank. Are all LP gas regulators the same?Every propane gas grill uses an LP regulator, but not all regulators are created equal. Though the purpose is the same, different types of setups require different types of regulators.