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How To Fix Rheem Tankless Water Heater Code 13?

Alton Alexander
By Alton AlexanderUpdated on June 3rd, 2022

Rheem tankless water heater code 13 is a code that indicates a problem with the water heater's combustion chamber. This can be caused by a variety of things, such as a dirty burner, a faulty gas valve, or a problem with the venting. If the code 13 is displayed, it is important to have the water heater serviced by a qualified technician.

Users typically search for a solution by asking about:

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  • rheem tankless water heater code 13

1. Check the power source to the unit to ensure that it is receiving the correct voltage

  1. Check the power source to the unit to ensure that it is receiving the correct voltage.
  2. Inspect the wiring to the unit for any loose connections or damaged insulation.
  3. Check the thermostat to ensure that it is set correctly.
  4. Clean any debris or dirt from the exterior of the unit.
  5. Follow the manufacturer's instructions for resetting the unit.

2. Inspect the inlet water filter and clean or replace it as needed

  1. Locate the inlet water filter on the tankless water heater.
  2. Inspect the filter for any dirt or debris.
  3. Clean the filter if necessary.
  4. Replace the filter if it is damaged or clogged.

3. Check the gas supply to the unit and ensure that the proper pressure is being applied

  1. Check the gas supply to the unit and ensure that the proper pressure is being applied.
  2. If the gas pressure is not correct, adjust it accordingly.
  3. Check for any blockages in the gas line that could be causing the pressure issue.
  4. If there are no blockages, then the issue may be with the unit itself. Contact a qualified technician to service the unit.

4. Inspect the venting system for the unit and ensure that it is clear and unobstructed

  1. Locate the venting system for the unit.
  2. Inspect the system for any blockages or obstructions.
  3. Clear any blockages or obstructions that are present.
  4. Ensure that the system is clear and unobstructed.

5. Have a qualified technician inspect and clean the unit as needed

  1. Locate the nearest qualified technician who can inspect and clean your unit.
  2. Schedule an appointment with the technician.
  3. Take the unit to the technician for inspection and cleaning.
  4. The technician will clean the unit as needed and may also suggest other repairs or replacements that could improve the unit's performance.