What Is a PTS Relay on a Dryer?

Relay

• The PTS relay on a dryer is simply the switch that turns the dryer on; it's a relay that initiates power when the PTS button is depressed, momentarily linking an electrical circuit. The relay is designed in such a way that if there are electrical problems with the dryer, the relay will not work. If you push the button and the dryer does not start immediately, you can look at the PTS relay as one of the first logical choices to check for problems.

Troubleshooting

• Troubleshooting a PTS relay is fairly simple. The relay has two terminals that should be checked with a voltage meter. If the voltmeter does not read 120VAC for each terminal, the PTS switch needs to be replaced. If these terminals have voltage and the dryer still will not start, the problem could be the motor relay instead. The motor relay is checked in the same way. If the motor relay proves to be in working order, then you can check the door switch.

Shut Off

• The PTS relay may also be the culprit if the dryer is not able to shut off. Of course, the issue could be a number of other things, but the PTS relay is one of the first things to check. After checking the timer by unplugging and plugging in the dryer, you can then troubleshoot the PTS switch. The PTS relay is likely the problem if the dryer begins running before you push the PTS button. It could, however, be a motor relay issue also.

Service

• If you are unable to solve your problem by performing the basic voltage test on the PTS relay terminals or by checking the basic related features such as the timer, then you may need to call in a qualified professional. In some cases, you may be able to save yourself considerable time and money by paying someone else to do the work. Otherwise you may be just throwing money into parts as you continue to troubleshoot using the trial-and-error method.