How to Test a 240 Volt Dryer Circuit
|By Dave Rongey - Summary:
Clothes Dryer is Not Working Right: Testing a 240 Volt Dryer Outlet, Tester Leads and Readings, What to do about Incorrect Dryer Voltage, How to Fix Dryer Problems.
Guide to Testing a Dryer Receptacle for 240 Volts
Dryer Voltage Problem
- I was given an Ideal voltage tester 61-065 to test the receptacles.
- I don’t have a manual and want to make sure I use it correctly.
Can you help me.
This electrical repair question came from: Kim, a Homeowner from Spring, Texas.
Dryer is Not Heating
- My 240 volt dryer outlet shows 240volts, but my dryer will not turn on.
- Sometimes there is only 120volts at the outlet.
Can you give me an idea what that might mean? Thank You.
This electrical wiring question came from Wayne , in North Port , Florida.
Thanks for your electrical question Kim and Wayne.
How to Test a 240 Volt Dryer Circuit.
Application: Troubleshooting – Testing 240 Volt Dryer Circuit.
Skill Level: Intermediate to Advanced – Best performed by a qualified electrician.
Tools Required: Basic Electricians Pouch Hand Tools and 120-240 Volt Tester.
Estimated Time: Depends on personal level experience, ability to work with hand tools and electrical troubleshooting skills.
Precaution: Identify the dryer circuit, turn it OFF and then Tag it with a Note before making inspections or wiring modifications.
Note: Electrical troubleshooting is best performed by a qualified electrical contractor.
IMPORTANT: Working on electrical circuits and in an electric panel is dangerous due to arc flash hazards and the possibility of electric shock and is not advised for homeowners or inexperienced or unqualified individuals.
Testing a 240 Volt Dryer Outlet when the Dryer Does Not Work
- Testing the Dryer Outlet
The dryer receptacle should be tested to see if it has 120/240 volts.
- Voltage Tester
The Ideal 61-065 Voltage Tester or any 120-240Volt Induction Tester has two wire leads and no voltage settings so it is very straight forward because you will see the voltage readings in the window of the voltage tester.
- Tester Leads and Readings
The leads are placed into the receptacle at two points. You have either a 3 wire or 4 wire circuit. You should receive two different readings, 120 volts and 240 volts.
- Testing for 240 Volts
The 240 volt reading should be between the two angled outlet openings.
- Incorrect Dryer Voltage
If you do not have the 240 volt reading then the circuit breaker should be checked.
- Resetting the Circuit Breaker
Turn the circuit breaker all the way into the OFF position, then back into the ON position.
- Retest the Dryer Outlet
Retest the dryer receptacle for 120 and 240 volts.
- Problem with the Dryer Circuit
If the voltage readings are not correct then the circuit will have to be inspected to the cause of the fault. The cause may be a bad circuit breaker, wire connections to the circuit breaker, or faulty wiring connections at the dryer outlet.
More about an Electric Dryer Circuit and Outlet
- Wiring a Dryer
- See an electric dryer installation with a typical 220 Volt electric power cord wiring system. You may find yourself with either a 3-wire or 4-wire electric dryer, or a 3-wire or 4-wire outlet. Lets look a how the electric dryer is wired and what to do if your cord does not match the plug.
- Electrical Safety and Voltage Testers
- When working on home electrical wiring, quality voltage testers can play an important part in electrical safety. Electrical testers enable you to identify electrical circuits and help prevent the possibility of accidental electrical shock.
Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all projects.
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