Table of Contents
How does a flame rollout switch work?
The flame rollout switch detects if there is a fire or hot exhaust gases in your furnace’s burner compartment. The flame rollout switch needs to be reset manually by pressing a button on the switch. The high limit switch detects if there is a high temperature in your furnace’s heat exchanger.
Can I bypass the flame rollout switch?
Can I bypass the flame rollout switch on my furnace? Yes, you can. But it is a bad idea – even for a “little while” until you can get a new one installed.
Why does the flame rollout switch keeps tripping?
Rollout switches trip because flames are burning back where they are not supposed to be. Possible causes include a stopped up vent, a stopped up heat exchanger, low gas pressure, or a cracked heat exchanger. All of these conditions are very serious and have the potential to do great harm.
How do you bypass the flame sensor on a furnace?
We have a different solution:
- Remove the access cover on the furnace.
- Locate the flame sensor.
- Cut the power to the furnace.
- Shut off the gas control valve.
- Take out the flame sensor by removing the mounting screw.
- Examine the part to see if it’s compromised, either by damage or dirtiness.
Can you jump out a flame sensor?
You won’t find steps to bypass the flame sensor anywhere. While some furnace technicians claim to know how to do it on some furnaces (newer furnaces won’t allow it), there is no commonly understood way to do it.
How does a furnace work without a flame sensor?
It’s a thin, metal rod that monitors the pilot flame. If the pilot flame goes out, the flame sensor will turn the unit off to prevent natural gas from leaking into the home. Without the flame sensor, if the pilot light goes out but the gas valve remains open, the gas will not burn and will seep out of the furnace.
How many volts should a flame sensor read?
Now we want to check flame sensor voltage. If the voltage is not within range there will not be enough electrical pressure to push the current through the flame. With your voltmeter, check the voltage between the sensor wire and the burner – it should be 90-107 volts AC.
Can you bypass flame sensor?
Can I bypass my Flame rollout switch?
We also provide a few alternative ways to troubleshoot and fix your flame rollout switch, so you don’t have to bypass it. What is the Flame Rollout Switch? The flame rollout switch is a safety device built into all modern furnaces to shut down the furnace if flames come out of the front of the furnace.
What is a flame rollout switch on a furnace?
The flame rollout switch is used to detect if there is a fire or hot exhaust gases inside of your furnace’s burner compartment. The rollout switch is located on the side or top of the burner compartment. Most flame rollout switches look like a little metal circle with two wires coming out of the back.
Why does my Flame rollout switch keep tripping?
Flame rollout switches trip when the flames from the burners escape from the heat exchanger into the rest of the furnace. Here are a few possible causes of tripped flame rollout switch:
What causes a furnace flame to roll out?
Low gas pressure is another cause for flame rollout. If the gas pressure in your furnace is low, then the flames have a good chance of rolling out instead of going into the heat exchanger. Low gas pressure is usually caused by dirty burners.