Rheem water heater troubleshooting

Rheem is a flagship brand of the Rheem Manufacturing Company along with such well-known brands as Richmond, Ruud, Russell, and Kramer. The company, whose history started in 1925, specializes in manufacturing water heaters, boilers, and equipment for houses and commercial buildings. Rheem is based in the US and belongs to a private owner. Its parent company is Paloma Industries.
Is your Rheem water heater not starting or making a strange noise? Have you noticed any other unusual symptoms? Check the table below for easy-to-use foolproof troubleshooting information. This list was created by technicians from the Rheem Manufacturing Company, so it is absolutely reliable. In some cases solutions are pretty easy, and can be performed even by homeowners without training or much experience in household appliance repair.

Rheem 72V20-1 water heater troubleshooting

ProblemPossible CausesWhat To Do
Rumbling noiseWater conditions in your home caused a build up of scale or mineral deposits on the heating elements.• Remove and clean the heating elements.
Relief valve producing popping noise or drainingPressure build up caused by thermal expansion in a closed system.• This is an unacceptable condition and must be corrected. Contact the water supplier or plumbing contractor on how to correct this. Do not plug the relief valve outlet.
Rattling noise during periods of water usageInternal heat trap fittings in operation.• This is normal for heat trap fittings when in operation and does not indicate a need for service.
Not enough or no hot waterWater usage may have exceeded the capacity of the water heater.• Wait for the water heater to recover after an abnormal demand.
A fuse is blown or a circuit breaker tripped.• Replace fiise or reset circuit breaker.
Electric supply may be off.• Make sure electric supply to water heater and disconnect switch, if used, are in the ON position.
The thermostat may be set set too low.• See the Temperature regulation of the water heater section of this manual.
Leaking or open hot water faucets.• Make sure all faucets are closed.
Electric service to your home may be interrupted.• Contact the local electric utility.
Improper wiring.• See the Installing the water heater section of this manual.
Manual reset limit (ECO)• See the Temperature regulation of the water heater section of this manual.
Cold water inlet temperature may be colder during the winter months.• This is normal. The colder inlet water takes longer to heat.
Water is too hotThe thermostat is set too high.• See the Temperature regulation of the water heater section of this manual.

Rheem Paloma PTG-53DV water heater troubleshooting

ProblemPossible CauseWhat To Do
Not enough or no hot water.Water Shutoff valve is not fully opened.Check shutoff valve and open fully.
Hot water faucet is not fully opened.Open hot water faucet completely. (The main burner goes off when incoming water volume is inadequate.)
Water piping is frozen.• Allow piping to thaw.
No electricity or water supply is cut oft'.• Check that proper power is being supplied and/or water supply is adequate.
Unit is not “ON”.Turn the unit “ON” by the button on the remote control.
The temperature may be set too low.Increase the temperature setting.
Mixing Valve Malfunctions (if applicable)• Check and replace if necessary.
Error code displayed on remote control.See instructions for Error Code and if required, contact a dealer for service.
Not enough water demand.• Increase water flow.
Water inlet filter clogged.• Clean water inlet filter.
Fixture aerator is clogged.• Clean aerator.
Scale buildup in heat exchanger.Check for error code. If required, contact a dealer for service.
Hot and cold water lines reversed.• Reverse water connections.
Water not hot enough.The temperature may be set too low.Check and open the gas valve fully.
The gas valve is not fully opened.Call your gas company to verify the gas meter and gas piping size.
Gas supply pressure is low.• Call dealer for service.
Bleed over in one of the hot water fixtures.• Decrease the temperature setting.
Water too hot.Temperature is set too high.Check shutoff valve and open fully.
Water shutoff valve is not fully opened.• Allow more water to flow.
Small amount of water has been heated.Normal operation. There is no need to call for service.
Fan continues to rotate after hot water faucet is closed.This function is to supply hot water when the hot water faucet is reopened.Normal operation. There is no need to call for service.

Rheem Single Element water heater troubleshooting

NATURE OF TROUBLEPOSSIBLE CAUSESERVICE
No Hot Water1. Manual switch turned off
2. Improper Wiring
3. No Power - blown fuse or circuit breaker tripped
a. Shorted wiring
b. Circuit overloaded
c. Improper wiring
d. Grounded element or thermostat
4. Manual Reset Limit (ECO) open
a. Thermostat(s) defective
b. Thermostat out of calibration
c. Heat build-up due to loose wires
d. Defective Limit (ECO)
Turn to ON
** Rewire per Wiring Diagram
** Replace or repair
** Provide adequate circuit or reduce load
** Rewire per diagram
** Replace Refer to "Operation Section"
** Replace
** Lower setting or replace
** Tighten wire connections
** Replace
Not enough Hot Water1. Heater undersized
2. Defective Element(s)
3. Miswired or defective thermostat causing only one element to work
Reduce rate of hot water use
** Check amperage, replace element if low
** Check wiring or replace
Water too hot or not hot enough1. Thermostat setting too high or low
2. Thermostat out of calibration
Change setting as required
** Replace

Noisy heating element(s)1. Scale build-up on elements** Remove and clean
Rattling noise during periods of water usage1. Internal Heat Trap fittings in operationNone. The rattling noise is normal for Heat Trap fittings when in operation and does not indicate a need for service.

Rheem Direct Vent Gas Tankless water heater troubleshooting

ProblemPossible CauseWhat To Do
Not enough or no hot water.Water Shutoff valve is not fully opened.Check shutoff valve and open fully.
Hot water faucet is not fully opened.Open hot water faucet completely. (The main burner goes off when incoming water volume is inadequate.)
Water piping is frozen.Allow piping to thaw.
No electricity or water supply is cut oft'.Check that proper power is being supplied and/or water supply is adequate.
Unit is not “ON”.Turn the unit “ON” by the button on the remote control.
The temperature may be set too low.Increase the temperature setting.
Mixing Valve Malfunctions (if applicable)Check and replace if necessary.
Error code displayed on remote control.See instructions for Error Code and if required, contact a dealer for service.
Not enough water demand.Increase water flow.
Water inlet filter clogged.Clean water inlet filter.
Fixture aerator is clogged.Clean aerator.
Scale buildup in heat exchanger.Check for error code. If required, contact a dealer for service.
Hot and cold water lines reversed.Reverse water connections.
Water not hot enough.The temperature may be set too low.Check and open the gas valve fully.
The gas valve is not fully opened.Call your gas company to verify the gas meter and gas piping size.
Gas supply pressure is low.Call dealer for service.
Bleed over in one of the hot water fixtures.Decrease the temperature setting.
Water too hot.Temperature is set too high.Check shutoff valve and open fully.
Water shutoff valve is not fully opened.Allow more water to flow.
Small amount of water has been heated.Normal operation. There is no need to call for service.
Fan continues to rotate after hot water faucet is closed.This function is to supply hot water when the hot water faucet is reopened.Normal operation. There is no need to call for service.

Rheem PowerVent gas water heater troubleshooting

ProblemPossible CausesWhat To Do
CondensationThis usually happens when a new water heater is filled for the first time.• This is normal. After the water in the tank warms up, the condensation will disappear. If, however, the condition persists, examine the piping and fittings for possible leaks.
Moisture from the products of combustion condensing on the tank surface.• This is normal and will disappear in time. Excessive condensation can cause main burner outage.
An undersized water heater will cause condensation.• Use a water heater size that meets the requirements of your needs.
Yellow flame or sootScale on top of the burner.• Contact a qualified service technician to remove scale.
Flue or Combustion air inlet openings are restricted.• Remove obstruction or debris from flue or combustion air inlet openings on water heater jacket.
Not enough combustion or ventilation air supplied to the water heater location.• Proper operation of the water heater requires air for combustion and ventilation. See the Combustion and Ventilation Air information in the “Installing The Water Heater” section of this manual.
Unable to light the main burnerAir in gas line.• Contact a qualified service technician to purge the air from the gas line.
Gas Cock Knob not correctly positioned.• Contact a qualified service technician to correctly position the gas cock knob.
Blocked Exhaust• Contact a qualified service technician to evaluate vent pipe for blockage.
Pressure Switch• Make sure the pressure switch hose is not "kinked".
Wire Connection not fully secured.• Contact a qualified service technician to confirm wire connections.
Combustion Shut-off Device tripped,• Combustion shut-off device should be inspected by a qualified service technician.
Gas Control Problem• Contact a qualified service technician.
Main burner does not stay litGas Controls (Thermostat’s) single use gas shut-off device has opened.• The gas control (thermostat) should be replaced by a qualified service technician.
Combustion Shutoff Device Tripped.• The combustion shutoff device should be inspected by a qualified service technician.
Rumbling noiseScalc and sediment• Drain the water heater to remove scalc and sediment from the tank. Refer to the top of page 26.
Relief valve producing popping noise or draining
Pressure build up causcd by thermal expansion to a closed system.
• This is an unacceptable condition and must be corrected. Contact the w'atcr supplier or plumbing contractor on how to correct this. Do not plug the relief valve outlet.
Not enough or no hot waterWater usage may have exceeded the capacity of the water heater.
• Wait for the water heater to recover after an abnormal demand.
Low gas pressure.• Check gas supply pressure and manifold pressure.
The gas control (thermostat) may be set too low.• See the “Water Temperature Setting” of The Water. Heater section of this manual.
Leaking or open hot water faucets.• Make sure all faucets arc closed.
Check valve error codes.• Refer to gas valve error code table on page 30.
“ON/OFF” switch turned off.• Turn “ON”.
Blower unplugged.• Plug in. Verify power supply (120VAC).
Combustion Shutoff System tripped• Contact a qualified service technician.
Water is too hotThe gas control (thermostat) is set too high.• See the “Water Temperature Setting” of The Water. Heater section of this manual.
Gas Control (Thermostat) Defective.• Contact a qualified servicc technician to replace the gas control (thermostat).

Error codes and troubleshooting