How To Check A Dryer Electrical Supply
How To Check A Dryer Electrical Supply. Before beginning any repair of the dryer, you must confirm that there is an adequate and adequate power supply for the dryer. What does that mean exactly? Electric dryers in the US USA operate on two 110 volt A / C circuits. The two 110 volt circuits combine to supply 220 volts of A / C to the dryer heater.
The dryer motor runs on 110 volts air conditioning. Dryer receptacles have a neutral L-shaped pole. You can check the voltage of your dryer by lightly sliding the cable out of the receptacle and using the cables of a multimeter to check the voltage at the cable blades that slide into the receptacle.
Between the left and right blades, it should read 220 volts. Between the left or right blade of the center blade (the L-shaped blade) should read 110 volts AC. The top 4-post receptacle has an L-shaped neutral and a separate floor. Requires a 4-wire cord and the ground cord is insulated from neutral in the tumble dryer.
Technicians check the voltage when the dryer tries to start or not heat for a very specific reason. Checking the voltage without the dryer connected doesn’t tell the whole story. A drying heater uses 220 volts and draws about 20 amps when heated.
Checking the voltage from L1 to L 2 on a faulty circuit may show 220 volts, but when the heater starts and starts drawing 20 amps, the voltage can drop to 0 volts. Imagine that your dryer wiring was a twisted wire. The stranded wire is made up of several small gauge wires bundled together to form a larger wire. What if all but one of those brackets were cut and only a small wire was completing the circuit?
When reading the voltage in the receptacle without the dryer plugged in, it would read 220 volts from L 1 to L 2. However, with the dryer plugged in and the heater trying to draw heavy current, the electrons (current flow) would muffle behind the cut. and only a small amount of current would pass through the cable. It certainly is not enough to heat the heater.
There are many things that can cause a partial circuit, but the result is the same as in the braided cable example. Many heaters or drying motors have been unnecessarily replaced due to a loose connection in the fuse box/circuit board or some other dryer electrical circuit problem. This is the Best article for washing machine repair.