Operation Malfunction and Service
Problem - Thermostat dial turned to brew and water in tank remains cold.
Possible Cause
1.No power at urn.
2.Power at urn, but no power at heater terminals.
3.Power at heater terminals, but no heat.
Service Checks and Cures
Check main switch. Check main fuses. (Three on 3 phase power, two on single phase power). Check that pilot light at top of thermostat bezel is ON.
Check urn control circuit breaker or fuse, reset or replace if needed. Check that water level is at STOP mark on gauge. Check that power contractor has power at coil, and clicks open and closed at thermostat dial is turned off and to BREW position. Check control transformer, if supplied. It may be burned out. Lastly, check for voltage at heater terminals. If voltage at heater is O.K., check for broken or loose wire. Water must be showing in center gauge glass 2” if Opt. 39 equipped.
Check heater for an open circuit with ohmmeter or continuity tester. If necessary, replace heater. (It is necessary to remove coffee liner to replace electric heater).
PROBLEM: Water boils continuously with thermostat dial on position “BREW” or “HOLD.”
Possible Cause | Service Checks and Cures |
1. Thermostat out of calibration. | Set knob on “BREW” and remove knob by |
| pulling outward. Using small screwdriver in |
| center of shaft, turn slotted screw clockwise |
| until pilot light goes out. Check holding |
| temperature by adding cold water. Light |
| should come on and water heat up to high |
| end of “BREW” zone on thermometer dial |
| and then shut off. NO BOILING. |
2. Thermostat is inoperative. | If impossible to get control to cycle on and |
Fluid has leaked out of | off and control temperature, replace entire |
diastat assembly of thermostat. | control. Be sure to drain water in urn below |
| level at which bulb enters urn. Also, shut off |
| all power before service is attempted. |
3. Contractor sticking in | Contactor must click on and off. If it sticks, |
closed position. | replace. |
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American Metal Ware 87710E Coffee Urn | Page 11 |
