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Symptoms of a faulty limit switch on a furnace may include the furnace not turning on or off properly, inconsistent heating, frequent cycling on and off, or the blower running continuously.

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6mo ago

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How do you repair a furnace limit switch?

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what are the symptoms of a bad temperature switch


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Bad thermostat, bad high limit switch. Check to make sure that its just not the fan running which makes it look like the furnace is running. If you check, and find the furnace is running and is still firing, shut it down and call a hvac company.


Why would your trane heating system home furnace go from hot air to cold air and stay on when you turn it off?

A bad or misadjusted fan limit switch is the first thing I would look for.


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Common symptoms of a furnace issue related to a bad flame sensor include the furnace not staying on, frequent cycling on and off, or the furnace not producing heat. Troubleshooting steps for this issue include cleaning the flame sensor with steel wool, checking the sensor's alignment, and ensuring the sensor is securely connected to the furnace.


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