Table of Contents
How do I open my furnace door?
Most furnace panels are easily removed without any tools. When you have the door open, you should first look for a gas control knob. This should be a large, clearly marked knob, that shows which way to twist it turned it off. Twist it off, and then look for the power switch.
Where is the furnace door located?
It is usually located in an area such as a utility closet (by a cold air return), garage, attic, basement, or crawlspace; in the case of a heat-pump (a dual-system) it will be located outside of the home.
How do I open my Lennox furnace?
How to Open a Lennox Furnace Before taking off the panel, you must shut off electrical power to the furnace. Set the thermostat, which is normally on the control panel at the bottom of the furnace, as low as it goes. To take off the upper access panel, carefully raise it and pull it away from the furnace.
What is the furnace door?
It’s also known as the blower door switch, and it operates like the door switch in a refrigerator that turns the light off when the door is closed. The function of the furnace door safety switch is actually the reverse of a refrigerator light switch.
What is a furnace door switch?
The door switch prevents the gas furnace blower from circulating CO in case the blower panel is off. Sometimes we forget to put the panel back on, or it could fall off during operation. If you bypass the door switch, blower operation will continue.
Why doesn’t my furnace shut off?
If your furnace won’t turn off, the easiest issue to fix is your thermostat. A furnace that is working hard to keep a high temperature, especially when it’s extra cold outside, can seem to run continuously. The second common thermostat problem is the fan switch. Your fan can be adjusted manually from your thermostat.
What causes a furnace to lock out?
Defective flame sensors are one of the most common causes of lockouts. If the sensor is faulty or dirty, it won’t be able to detect the flame and the controller will stop the ignition sequence. Most modern furnaces will let you start the furnace two more times before it goes into a lockout.
Why won’t my furnace shut off?
Check Your Thermostat If your furnace won’t shut off and you’re worried, don’t panic. The first thing to do is check the thermostat. Check whether your fan is set to On or Auto. If it’s On, try setting it to Auto — this will turn the fan off when the temperature reaches the desired setting.
Where is the pilot light on my furnace?
Near the bottom of your furnace is a switch that normally says “Pilot,” “On” and “Off.” Find this switch and turn it to the “Off” position. Wait at least five minutes. This is important because it gives the gas time to dissipate, which is necessary to avoid possibly starting a fire.
Where is the on/off switch on a furnace?
It’s usually mounted on the side of the furnace or a wall nearby. Among other benefits, this switch allows you or your plumber or repair technician to shut off the electricity to the furnace without having to go to the main service panel to switch off the circuit breaker.
Where is the on/off switch on my Lennox furnace?
Turn off the power switch on the furnace, which will be located on the side of the control panel–it will look very similar to a wall light switch.
Why is my Lennox furnace not starting?
Most likely, either the electrical system providing your furnace’s power has shorted or the power switch has blown. Try resetting your furnace’s circuit breaker. If it has blown, you will need to replace it. The furnace’s igniter might either be cracked or faulty.
Can I run furnace with door off?
Most forced-air furnaces have a safety switch that prevents furnace operation when the door or panel to the blower compartment is not in place. Some older forced-air furnaces do not have a safety switch and can be operated with the filter compartment door/panel off or not properly in place.
Does furnace room need vented door?
If the furnace is in a small room, then we need ventilation openings in the walls or door of that room to let in plenty of air to make up for the air that the furnace is using. If it’s not big enough then it’s called a confined space and we have to provide ventilation openings for more combustion air.
How can the safety lockout be reset?
Though lockout mode errors and resets do vary from manufacturer to manufacturer, most use a simple reset procedure that involves turning power off to the furnace for thirty seconds or longer and turning it back. The interrupted power supply clears the lockout and will allow the unit to attempt normal operation again.
What is a furnace blower door?
Most heating and cooling contractors have some familiarity with the blower door device – that big fan the weatherization guys and insulators plug into the doorway that sucks air from a home in order to find leaks.
Can you jump a furnace door switch?
So after working on a gas furnace make sure the door switch is functional before you leave. Do not leave it jumped out or mechanically defeated.
