Open up or glance through the peephole of the gas furnace to check the color of the flames firing up in the burner. If it is yellow-colored, it means that the gas is not completely burning. There is a chance that carbon monoxide is not vented out of the system accurately. Get the service of a technician to solve the problem with the furnace flame sensor or gas-burning cleaning. With that, monitor the readings of carbon monoxide detectors.
Rusted Flue Lines
The flue system is important for releasing dangerous carbon monoxide gas outside of the home. If there is a leak, it causes flue lines to rust and corrode because carbon monoxide gas is not released accurately. If the flame sensor is shut down and the furnace is working, get the services of experts.
High utility bills
If heating bills are much higher than on normal days, even in winter temperatures, then you must again check that the air filters are clear. If there is no need to replace it, there can be a high level of problem with the flame sensor in the furnace that makes it difficult to work at its normal operation. .
Old Age
After about twenty years of working, it is needed to use new, high-energy-efficient gas furnace models. It helps to save on the affected furnace flame sensor, and for replacing a new unit, you can get expert services.
Exhaust Smells
Rusted flue lines can help exhaust gases release gases before they vent, resulting in an unusual smell in the home. It is an indication of a problem.
Constant Thermostat Adjustments
Make constant checks on the thermostat to get cool air running in the home. For proper operation, you can rely on the services of an expert technician to find the main causes of any problem and solve it instantly.
How to Find the Flame Sensor in a Furnace
There is no need for a furnace expert to find the flame sensor. Just find it below the furnace access cover. It can be connected with tabs, knobs, slots, or screws. When it is opened, check the metal rod with white or discolored porcelain about its bent mounting end. It will also come with a single wire connected to it. It is the flame sensor. The porcelain works as insulation to avoid self-grounding on metallic furnace frames. The furnace flame sensor will be on the right side of the burner configuration. It will enter the open fire chamber.
How to Clean a Furnace Flame Sensor
Here are some steps explained to clean the furane flame sensor.
- First of all, turn off the furnace at the toggle switch on the furnace or breaker panel. Turning off the heat at thermostats is not enough and does not cut power to the unit. the gas valve if furane does not use electronic control. If the furnace is operating, let it cool for 30 minutes before working.
- Use the furnace manual to find the flame sensor. Normally, the access panel used to be removed with a screwdriver to get the flame sensor. The flame sensor is like a bent metallic rod close to burners.
- The sensor is normally configured with a quarter-inch hex screw and connected with wires. Remove the screw and slide the sensor out of the housing. Detach it from the wires.
- Rub the metallic part of the sensor with a wire brush, straight-edge knife, or abrasive materials, like steel wool or emery paper. Rub enough to remove residue, but be sure to save the sensor from damage. Do not rub porcelain with an abrasive. Wipe the sensor clean with a paper towel.
- Again, connect the sensor wires and set them to their original location; replace the screw; and restore the access panel.
- On the power to the furnace. The furnace does a system reset and takes longer to fire up than usual. Ensure the burners ignite and stay lit, or complete the heating cycle. If the furnace is affected, the flame sensor can be faulty. add a new sensor or get the services of a technician to find the issue.
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