When the switch re-closes or the call for heat is lost, the control runs the induced draft motor through post-purge and runs the indoor blower through the selected fan off delay. The control will flash “3” on the LED until the limit switch closes. If the limit switch is open and a call for heat is present, the control de-energizes the gas valve and runs the indoor blower motor on heat speed, and runs the induced draft motor. Limit Operation - The limit switch is ignored unless a call for heat is present (W energized). If the pressure switch is closed, the control will flash "2" on the LED and wait indefinitely for the pressure switch to open. Pressure switch is closed before inducer is energized.Ĭall for Heat - The control checks to see if the pressure switch is open. The control will leave the inducer energized indefinitely as long as the call for heat remains and the pressure switch is open. If the pressure switch does not close within 30 seconds of the inducer energizing, the control will flash “1” on the LED. Pre-Purge - The control energizes the induced draft motor and waits for the pressure switch to close. Pressure switch does not close within 30 seconds of inducer energized. Internal control fault or no power Normal operation, no call for heat Normal operation, call for heat present Everything is going well with your furnace.Ī Green LED labeled “OK” is provided to indicate system faults.
3 green colored flashes on your furnace has the same meaning as 2 green colored flashes. If there’s 3 green colored flashes, please see the meaning for 2 green colored flashes above. The 2 green colored flashes you are seeing also means that no stored error codes are being found. If there’s 1 green colored flash on your York Furnace, it means your furnace is performing successfully and no need for heating exists.Ģ green colored flashes on your furnace means that it is attempting to recall/retrieve previous York Furnace error codes which are stored. After that hour is up, an attempt to re ignite will occur again. If after 3 attempts to re ignite is unsuccessful, “lock out mode” will remain in place for one-hour. This valve will need to be replaced.ħ red colored flashes signals to you that your furnace is in “lock out mode”. This switch can be reset by pushing the center of the red button on your furnace ( it should be located on the side ).Ħ red colored flashes on your furnace means that the modulating gas valve has failed. If you notice 5 red colored flashes on your York Furnace, it signifies that your furnace’s roll-out switch, or auxiliary switch, may be open. A plugged air filter, or restricted air flow may be the reason behind this York Furnace error code. If you see 3 red colored flashes, it’s possible that your pressure switch is probably just stuck in the ‘open’ position.Ĥ red colored flashes may be signaling that the “high-limit” switch might be open. If this switch gets stuck in the ‘closed’ position, you will receive this error code. You may have a gas leak at the valve.Ģ red colored flashes means that the switch that controls pressure is possibly stuck. Taking it from the top, if you happen to see 1 red colored flash on your York Furnace, it signals that the gas valve isn’t receiving power.
If you notice that you are seeing a continuously, fast flashing amber/yellow error code, it means that flame sensing rod needs a little cleaning-up.
The air flow will not operate as it should when you see this error code.ĥ amber/yellow flashes on your York Furnace signifies that the vent and/or combustion air system is restricted. If 4 amber/yellow flashes appear on your York Furnace, it means that the heating of your system may be somewhat restricted. Of all of the York Furnace error codes, this is one you may see most frequent. If you notice 3 amber/yellow flashes, this means that everything is completely fine and your York Furnace is just completing a recent cycle. If 2 amber/yellow flashes appear, it signals that everything is okay and there is a call for heat. If you see 1 amber/yellow flash, this means that everything is okay and the thermostat is signaling the need for cooling. Breaking down each color, and number of flashes, will help you solve the problem you are having with your York Furnace. Each color will also flash a specific number of times to signify a specific error. York Furnace error codes are seen in three colors, red, green, and amber/yellow.
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