Fan Limit Control Switch Troubleshooting

Take care not to touch wires or any switches as you could get shocked.

Fan limit control switch troubleshooting.

The furnace filter is clogged and raises the temperature within the plenum prematurely tripping the sensor. The instructions differ depending on whether you have a combination switch or separate high and fan control limit switches as well as on the specific model you have. The switch s sensor becomes dirty and stops working correctly. Fan limit switches can be bought at an hvac supply stores or online.

Where can you buy a fan limit switch. Whatever the case may be it is important to contact a trained ac company in gresham such as the clean air act inc. When the exchanger is heating up the control expands and rotates appropriately. Call us today if you need ac service in the gresham area.

So my fan limit control switch seems to be acting up. If your ceiling fan is brand new contact the manufacturer for a replacement fan. If you are using a remote or wall control to reverse the ceiling fan confirm the dip switches on the control and receiver are set to the same frequency. It could be that the ac limit switch is stuck or that its wiring has short circuited.

High limit 200 degrees fahrenheit. When it hits the ceiling temperature i set the fan turns on. All of the sudden it snaps about 20 degress very quickly below. Fan control limit 90 and 130 degrees fahrenheit.

However the typical temperature settings are as follows. In this case replace the reverse switch. If both the blower motor and limit switch test good than other possible problems may be the contactors circuit board or gas valve and possibly the thermostat. And the limit switch should be pulled out.

Find the fan limit switch see that article and return to this page if you don t know what the fan limit control switch looks like and if your control sports a metal cover remove that too. Problems that commonly occur with fan limit switches include. If the fan limit switch worked normally continue as follows. The blower motor stops working and overheats.

If you have an older ceiling fan the switch may be worn out.