20 Most Recent Emerson Lennox Ducane Armstrong Furnace Blower Motor K55hxkpy-9740 Questions & Answers

Sometimes a louver on the squirrel cage comes loose maybe from taking it apart...hand test every louver. You may find that you need a new one.

Its drawing much to high amperage on startup. It may be dirty, unmantained, blocked with something, or a bad run capacitor. Likely, at this stage, it needs replacing. If its belt drive, be sure you have the proper slack and the bearings, if needed, are oiled and not faulty.

The blower requires proper voltage, I will include a diagram however if not familiar with power I advise against trying any repairs.

Any furnace providing heat where it should and has little to no heat from its exhaust is doing a GREAT job ;-) Our high efficiency gas furnace was installed with a PVC pipe as a 'chimney' which bothered me to no end until I found the surface temp of that plastic pipe only barely warm to the touch- that is a home run!

The induced draft motor has a induced draft proving switch that is a pressure switch , it resembles a silver round flat device about 4 inches across with 2 wires, it will have a tubing attached to it that also is attached to the induced draft assembly housing on a barbed port, this is how the induced draft is "proven" thus giving the A OK to go to the next sequence of operation which is ignition trial period, it will attempt a ignition sequence for about 30 seconds 3 times before it will lock out if it has a circuit board, if so a flashing code will be observed and the legend in the back side of the blower door will tell you the codes meaning. What is wrong 80% of the time is the barbed port on the induced drafts assembly is obstructed by carbon and not allowing the pressure switch to "sense" / prove the induced draft motor is running. You can connect the pressure switches 2 wires after the induced draft begins, this simulates a operational pressure switch and should begin the ignition phase if all is well, otherwise if all safety's or high limits are closed, then the ignition module is bad. This is for spark type, if you have a hot surface ignitor look to se if its broken or cracked or has a burned spot visible, if not try testing for 120 volts to it, if you read proper voltage, then the hot surface igniter is bad.

Here you go.

bad fan limit

I would buy another board. The boards contain safety features.

www.lennox.com/support Ask them.

manufacture can tell you year. what brand is it? goodman? my guess is 97 dec.

Try the fan in the ON position on the thermostat, do you mean the fire shuts off or the blower?

Here you are.

Limit switch. Call a technician :)

Hit the side of the furnace. Some times there's a sensor inside that gets locked up from a dirty filter.

Probably, see the wiring directions, or call an HVAC technician.

you are the only one who knows how many wires you have and hvac. here is the manual and you can look at wiring diagrams. https://www.luxproducts.com/wp-content/uploads/2017/07/tx500_manual_en.pdf

you can lower temp setting ,or leave it alone it is normal here is a link to instructions copy and paste https://climate.emerson.com/documents/thermostat-1f86ez-0251-instructions-es-es-1570244.pdf ..

The Flame icon ( ) will display flashing to indicate that the Aux system is operating. Press to adjust the thermostat below room temperature. The Aux heating system should stop operating.