How to Troubleshoot & Replace Whirlpool AP6008555 / WP3405281 Power Relay (48 Vdc Coil)

There are 2 relays inside the upper console,one to start the gas burner and one to keep the tumbler motor spinning.Switch the 2 relays to determine if that is your problem then purchase and replace the relay. 5 minutes and you are done. 

Replaced relay under control panel 

First things first checked for proper voltage at outlet which was ok . I then accessed the heater and checked it as well as the thermals which were ok . Ran dryer to find no voltage from heater relay verified by switching heater relay with motor relay as they are the same unit then heated but motor would stay running .i ordered the part mid afternoon and received it next morning the staff at appliance parts pros are excellent at assisting the customer.I recommend them to everyone looking for parts. 

Replaced with new relay. Had to replace in addition one burnt up wire connecter. That was all. Connected power and everything worked. 

I did not bother to troubleshoot the original parts. After 20 years I figured that I should just replace them both. The hardest part of the repair was determining how to access the control panel. Once that was done, it was merely a matter of 5 minutes to swap out the parts. The relay simply screwed in. The switch as designed for easier, non screw, replacement, pointing out that they expected this switch to fail and need to be easily replaced. 

We replaced the start relay. It took about 5 minutes to replace relay. 

Replace motor relay. 

Got your new relay. Removed cover from the back of the control panel, seven screws. Two screws to remove relay and four wires. Reinstalled wires on new relay and remounted with two screws. Replaced cover. Plugged in cord. Pushed button and walla it started and ran. 

I have an old Kenmore Elite gas dryer which was extremely noisy. Research brought me to the conclusion to replace the drum support rollers and the idler pulley assembly. Instead of just replacing the idler pulley I decided to purchase the assembly since it had a new shaft which I was concerned was worn too. I found a video for my exact model elsewhere. My model is much older than those included on this site. When replacing the drum support rollers I applied some Super Lube to the shafts. I did the same for the idler pulley shaft too. I bought four Tri-Rings just in case I needed them. I did not since the ones there were fine and did not break. I also bought just the idler pulley just in case I wanted to go that route and replace just it instead of the assembly. Upon inspection of my assembly I did not like how the pulley was spinning so I decided to replace the whole assembly. In my order I also ordered a relay but that was for a different problem with the dryer. My dryer was turning off intermittently before the cycle was done. My specific symptom was that when the dryer quit if I held in the start button the drum would spin but once I released it it would stop. There are two relays used (same part) and one of them is for the motor. Replacing that one solved that problem. 

This is an older Kenmore gas dryer we keep in the finished lower level for guest use. I have relied on Appliance Parts Pros twice before, once for the part to convert it to propane use, then more recently to replace a start relay (would only run when start button held in). This time I replaced the heat relay (same part as the start relay) and that solved the issue. Easy to do in ten minutes or so once you know how to access the control panel. Part arrived within 24 hours from the time ordered.