Gas Furnace Sequence Of Operation

The furnace is in standby mode, waiting for a heated call, the thermostat requires heating, turning off the thermostat switch, and sending 24 volts to the W (heating) terminal on the control board.

If all is OK, the air flow switch closes and the loop through the safety device is completed.

Depending on the furnace, high temperature surface ignition device (HSI) or spark ignition device will start. If you have a permanent pilot, skip this section.

When the flame sensor detects a flame, the ignition source turns off, the gas valve opens, if not sensing the flame, the burner ignites and the lock normally starts three times after closing the gas valve.

Next, some of the indoor fan / blower motors start and start immediately, others are delayed by timers or thermostats.

When the thermostat is filled, the switch opens and the 24 volt signal on the control board is shut off.

When the gas valve is closed at the same time or later, the ventilation / combustion blower motor of the inductor is turned off

At this point, the fan / blower motor in the room will continue to rotate to get all the heat, or close slightly later.

Understanding the operating sequence of the gas stove saves time and expense for troubleshooting the phone. We watched over and over again that engineers ordered several parts to repair the gas stove. Has the gas valve, control panel, igniter, limit switch failed at the same time? It may not be the case. You may laugh, but we regularly receive orders for these parts. The order of operations varies by type and brand. In most cases, however, the manufacturer entered a hot surface or direct spark ignition in the following order:

Therefore, when troubleshooting an electronic ignition gas stove, it is necessary to understand a series of operations. It is particularly suitable for all kinds of electronic ignition system. You also need to understand how the controls work. A good engineer can find basic problems in a matter of minutes by walking to the electronic ignition gas stove. For a series of operations related to electronic ignition gas stove, see this article. Among the different types of electronic ignition gas furnaces are direct combustion gas furnaces and indirect gas combustion gas furnaces. Indirect gas stoves use indicator lights. Direct fire type gas stove will start ignition of main burner without indication light. The key to both systems is that each electronic ignition system has its own way to prove fire or prove there is fire. In the absence of a fire, the system is shut down so that no gas is injected into the space, which may be very dangerous.

This is the operating principle of the gas stove. Whether you are at home, you have a stove, or you have your own stove, or if you only borrow the preset comfort level is below the gas forced air heating system Thermostat runs below When you do, tell it to room temperature. The thermostat sends an electric signal to the furnace, the valve opens, and it shows to the natural gas burner and blower opening. LED lit stove burner combustion chamber. This is a metal container and generates heat in the furnace heat exchanger. After warming, hot air is pushed into the hot air chamber, and then it is blown out through the piping system room