Troubleshooting Procedures
!WARNING
To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing requires power.
Manometers
Insufficient gas flow can cause problems. Therefore, checking the gas pressure at the time service calls are performed may prevent a return call.
Gas pressure can be checked with an instrument called a "manometer." This device can detect a "low" LP tank, restricted gas flow, bad gas valve, a malfunctioning pressure regulator, too many gas appliances operating off of a small supply line, or an improperly converted appliance from Natural to LP gas.
Other types of manometers exist; however, the type of manometer we will discuss in this manual is a "U" shaped tube in which water is added. Both ends are open so the water can equalize and seek its own level, which will be the same in both arms of the "U" shaped tube.
A flexible rubber hose is connected to the lower, open end of the manometer and to the gas source. Gas pressure is exerted on one of the water columns, pushing it down.
The water level then rises in the other column. The difference in water levels equals the measure of gas pressure.
The water column (W.C.) for a Maytag dryer is 3.5" W.C. for Natural gas and 11" W.C. for LP.
How to Use:
1.Disconnect power supply to unit.
2.Remove front panel.
3.Shut off the gas to the dryer.
4.Install a 1/4" tapered fitting at the gas valve pressure tap. Use thread seal tape or compound on fitting.
5.Fill the manometer tube with water until each side equalizes at "0" water column.
6.Push the end of the manometer hose onto the 1/4" fitting located on the gas valve.
7.Connect hose to one end of the manometer.
8.Turn on the gas and reconnect dryer to power. Run the dryer in a heat cycle. Read the manometer with the burner ON, (check for gas leaks).
9.When the gas is on, the amount of water column present is equal to the total amount of deflection shown in the manometer.
Note: Once the test is completed, make sure the tapered fitting is removed from the gas valve and the plug is repositioned into the gas valve and resealed with pipe seal. Check for gas leaks again with a soap or bubble solution. NEVER
USE OPEN FLAME TO CHECK FOR GAS LEAKS.
Note: IF HIGH WATER COLUMN PRESSURE IS DETECTED; the gas flame can damage the flame spreader on the burner. (this can be cuased by the wrong orfice, improper air mixture or high gas pressure. If pressure is as high as suspected, contact the local gas utilities company to check the outside regulator.)
Gas Valve
Orfice
Valve
Pressure Tap
16 | 16022904 Rev. 0 | ©2004 Maytag Appliances Company |