Suggested Corrective Actions - Westinghouse WGRGH20**75F Series Installation, Start-Up, Maintenance, Parts, Warranty

44
Error Code Description
Gas Valve, ECO Hot Water
Outlet, ECO Burner Plate, or
E28
Intake / Exhaust Pressure
Switch (APS)
E30 RPM too High
E31
RPM too Low
E36
Relay Error
E37 Communication Problem
E38
Sub RAM Failure
E39
Sub CPU Hardware Problem
E40 Main RAM Failure
E41
Flame Signal Problem
E42 Main ROM Failure
E43 Main AD MUX Failure
E54
Gas Valve Leak Detected
Table 27 - Error Codes and Suggested Corrective Actions
NOTE: In some cases the Error Code may be cleared by pressing the
clear the Error Code, contact your water heater installer for service.
B. Suggested Corrective Actions
Problem
No electrical power to the water
heater
No water available when faucet is
opened
Hot water is not available when a
faucet is opened
The water temperature is not hot
enough or turns cold during use
whl-605 Rev. 002 Rel. 000 Date 1.23.19
Cause
The gas valve has lost power.
DC blower motor is rotating
too fast.
DC blower motor is rotating
too slow.
Controller failure concerning
the gas valve.
Communication failure
concerning the subsidiary CPU.
Subsidiary RAM failure.
Control failure concerning
subsidiary flame signal.
Main RAM failure.
Controller failure concerning
flame signal.
Main ROM failure.
Main MUX failure.
Gas valve failure.
Possible Causes
1. Is the plug on the power supply cord unplugged
from the electrical outlet?
2. Is electrical panel's 10 Amp circuit breaker
tripped?
3. Is the fuse on the circuit board good?
4. Is there a power outage to the home?
1. Is the water supply valve shut off at the meter (do
cold water faucets work)?
2. Is the water supply valve near the unit open?
3. Is the water pipe frozen?
4. Is an error code flashing on the display panel
(leak detected)?
1. Does the water heater have power (plugged in)?
2. Is the water heater turned ON?
3. Is an error code flashing on the display panel?
4. Is the gas supply valve open or shut off at the
meter (do other gas devices work)?
1. Is an error code flashing on the display panel?
2. Is the water temperature on the thermostatic
mixing valve set too low?
Possible Remedies
1. Unplug the water heater.
2. Check wire connections of the gas valve, thermostat, and
air pressure switches.
3. Use an ohmmeter to check for continuity of the following
items:
a. The thermostat.
b. The intake air pressure switch.
c. The exhaust air pressure switch.
d. The gas valve.
4. Replace the defective item.
Call for service. Replace the blower motor.
Call for service. Replace the main controller.
button to turn the water heater OFF, then ON again. If this does not
1. Reset the plug.
2. Reset the circuit breaker.
3. If the display panel is blank, unplug the unit
or contact an authorized service technician.
4. Contact the power company.
1. Open the closed supply valve.
2. Open the water supply valve.
3. Turn OFF the unit, close all water valves and
the gas valve. Contact an authorized service
technician.
4. Refer to error code information and contact
an authorized service technician.
1. Restore electrical power to the unit.
2. Press and hold the Power button to turn the
unit ON.
3. Refer to the Diagnostic and Error Codes
section in this manual.
4. Open the gas supply valve.
1. Refer to the Diagnostic and Error Codes
section in this manual.
2. Adjust the outlet water temperature on
the thermostatic mixing valve (refer to the
procedure in this manual).
Possible Remedies