Trouble Shooting Guide
NATURE OF TROUBLE | POSSIBLE CAUSES | SERVICE |
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No Hot Water | Manual switch turned off (if equipped) | Turn to ON |
| Blown service panel fuse or breaker | Replace or reset |
| See flashing LED light on display board | Rectify problem by diagnosing using the Display Board LED |
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| chart |
| Improper or loose wiring to control board | Check and tighten |
| Electrical polarity is reversed. Green LED on display | Reconnect electrical supply in proper polarity |
| board is not on. |
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| Gas Valve turned "OFF" | Turn gas valve "ON" |
| Low gas pressure causes lockout | Check gas pressure when unit fires |
| Not enough gas pressure for demand of system | Increase pressure to 7" - 14" w.c. on inlet side of gas valve |
| Bad gas regulator before heater or gas regulator is | Replace regulator |
| too small for load |
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| Bad gas meter or meter too small for load | Replace meter |
| Supply pipe is less that 3/4 inch diameter | Replace with 3/4 inch pipe |
| Gas regulator too close to heater | Must be at least 10 feet from heater |
| Venting restricted enough to cause lockout | Check and clear venting pipes and vent termination |
Not Enough Hot Water | Thermostat set too low | Increase thermostat setting |
| Heater is undersized | Resize and compare |
Water Too Hot | Thermostat setting too high | Lower thermostat setting |
Slow Hot Water Recovery | Improper gas supply | Check gas pressure |
| Venting restricted - but not enough to cause lockout | Check and clear venting pipes and vent termination |
Noisy Water Heater | Puffing on ignition | Adjust gas valve |
| Loud pop on ignition | Adjust gas valve |
(Includes banging, huffing and | Huff and puff during operations | Adjust gas valve |
puffing) | Intermittent huffing and puffing | Check for |
Excessive Relief Valve | Excessive water pressure (just a little from the T&P) | Check for open or closed system. Install thermal expansion |
Operation | Excessive water temperature (approx. 2/3 of tank | tank. Install proper expansion tank on cold side. |
| Check ECO/vent switch LED flashing; lower setting or replace | |
| volume is on the floor) | thermostat/ECO probe. |
Rusty Water | Excessive iron content | Have water analyzed. Install filter (if necessary). |
| Dielectric unions installed | Install |
Water On Floor Around Unit | Condensate removal system is not working | Check condensate line for blockage |
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| Check condensate line is directed to floor drain |
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| Condensate pump not working (if equipped) |
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| Drain line is "vapor locked". Install a vent in the condensate |
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| drain line |
Water heater is leaking | Cold in or hot out joints (connections) | Check joints and repair |
| T&P valve | Check, tighten and/or replace |
| Temperature/ECO probe | Check, tighten and/or replace |
| Inner tank has a pin hole | Replace water heater |
HOW TO OBTAIN SERVICE ASSISTANCE
Should you have any questions about your new water heater, or if it requires adjustment, or routine maintenance, it is suggested that you first contact your installer, plumbing contractor or previously agreed upon service agency. In the event that the firm has moved, or is unavailable, refer to the telephone directory commercial listings or local utility for qualified service assistance.
Should your problem not be resolved to your complete satisfaction, you should then contact the Manufacturer’s National Service Department at the following address:
RHEEM MANUFACTURING COMPANY
2600 Gunter Park Drive East
Montgomery, Alabama
You may also obain technical assistance by calling
When contacting the manufacturer, the following information should be made available:
1.Model and serial number of the water heater as shown on the rat- ing plate attached to the jacket of the water heater.
2.Address where the water heater is located and can be seen.
3.Name and address of installer and any service agency who per- formed service on the water heater.
4.Date of original installation and dates any service work was per- formed.
5.Details of the problems as you can best describe them.
6.List of people, with dates, who have been contacted regarding your