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Main burner on furnace burns all the time even with thermostat turned down a no electric signal to valve from thermostst?
Depends on what type of furnace you have but it sounds like 1.a wire from the thermostat is shorted, 2.the thermostat is stuck itself or 3. the main gas valve is stuck. Try turning the power off to the furnace next disconnect the wires leading to the gas valve if this stops it check 1 and two if this doesnt stop it then it is number 3
What else can I help you with?
Why does the furnace main burner shut off intermittently?
The furnace main burner may shut off intermittently due to issues with the thermostat, a dirty air filter, a malfunctioning flame sensor, or a problem with the gas supply. It is important to have a professional technician inspect and diagnose the issue to ensure safe and efficient operation of the furnace.
Does a furnace have a pilot light and how does it function in the heating process"?
Yes, some furnaces have a pilot light. The pilot light is a small flame that ignites the main burner when the furnace needs to heat the air. It functions by staying lit continuously to ignite the gas when the thermostat signals the furnace to start heating.
Why will the gas furnace burner not light up even though the pilot light is on?
1- Defective gas controller2- Thermostat/ aqua stat not calling for heat3- electric shut offTripped or defective safety device, gas valve set on pilot, bad transformer. Don`t kill yourself looking for the aquastat. That is a boiler control and your furnace does not have one.Electic good-- whatelse can I test?
Why does a high efficiency furnace main burner shut off?
A high efficiency furnace main burner shuts off to prevent overheating and ensure safe operation.
Why does my furnace flame keep going out?
There are several possible reasons why your furnace flame keeps going out. It could be due to a dirty or faulty burner, a clogged air filter, a malfunctioning thermostat, or a problem with the gas supply. It is important to have a professional HVAC technician inspect and repair your furnace to determine the exact cause of the issue.
Why does my furnace keep trying to start but doesn't ignite?
Your furnace may keep trying to start but not ignite due to issues with the ignition system, a clogged burner, a faulty thermostat, or a lack of fuel supply. It is recommended to contact a professional technician to diagnose and fix the problem.
How do you fix a furnace main gas valve that is stuck in closed position - Thermostat does not always cause main burner to light?
If your main gas valve is stuck in the closed position, it must be replaced. This condition is the reason your thermostat will not cause the main burners to light.
Why does a high efficiency furnace's main burner shut off?
A high efficiency furnace's main burner shuts off to maintain a consistent temperature in the home and prevent overheating.
Where is the limit switch located on a furnace?
The limit switch on a furnace is typically located near the heat exchanger or burner chamber. It is a safety device that monitors the temperature inside the furnace and shuts off the burner if it gets too hot.
Why does the furnace main burner shut off after ignition?
The furnace main burner shuts off after ignition to maintain a safe and consistent temperature within the heating system. This helps prevent overheating and ensures efficient operation of the furnace.
Why is my Goodman furnace not igniting?
There are several possible reasons why a Goodman furnace may not be igniting. Some common causes include a faulty igniter, a clogged burner, a malfunctioning thermostat, or a problem with the gas supply. It is recommended to contact a professional HVAC technician to diagnose and fix the issue.
Where is the location of the furnace high limit switch?
The furnace high limit switch is typically located near the heat exchanger or burner chamber of the furnace.
