How do I know if motor is bad on a kenmore 90 series dryer

that problem is your thermostat its small and round heres pics test thermostat with multimeter

Check your breaker by turning it off and back on. Then check wiring at plug and back of dryer. You could have a bad relay switch. You can find it under the top and put the 2wires together and try it then . If it works, you know that it is the relay switch. Last but not least, it may be your element. Check it visually to see if there is a break in it or a weak spot.

L1 connects to the heating element through the timer, a thermal cutoff, the operating thermostat, and the hi-limit thermostat. The heating element then connects to L2 through the motor centrifugal switch.also check the block where the cord connects to the dryer and make sure you have correct voltage there,if you have 120 going to motor you could have a bad motor if it's not going to heater,just do what you're doing,read it out with your meter,inspect the wires too,one could have melted,make sure when you read the parts out that you pull one of the wires off,you can get a back feed and it will show continuity,if i can help with anything else let me know

http://www.washerwizzards.com ,,,,check the thermofuse in the back,,it is a white fuse coverd in plastic with 2 wires attached ,,,,hook the 2 wires together and test it

yes,i would check with a set of meters to see if it has continuity.it is located at top of element cage.or a tip you can check it by taking the 2 wires from the thermal fuse and pu them together with electrical tape plug the dryer in and see if it heats.

usually if it heats up but long dry times ,,air flow problem inspect exhaust hose and vent s should resolve problems...

HI danon this dryer its common to have the blower wear out, it slides on the motor shaft, and what they do is wear out the flat in the blower. that could have caused the element to fail. check the blower thanks the appliance doc. please rate my answer. thanks

humming noise usually means a bad motor. how much did you disconnect when changing element?

let me know if you need  help

heating element is located at the back of the dryer. if you can see a big coil of wires like a long spring laid back and fort to a duct , that is the heating element.