Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater 1 BLINK / 3 SEC Error Fix: Normal Operation

The status LED on the gas control valve blinks once approximately every 3 seconds. This indicates the water heater is operating normally. The electronic gas control is functioning properly and will fire the main burner when the water temperature drops below the thermostat setpoint. This is the expected, healthy state. No action is needed.

info2 fixes available✨ Free fix available

Quick Answer

Error 1 BLINK / 3 SEC on the Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater means: Normal Operation. The top-ranked community fix is “No Fix Needed - Normal Operation” (easy difficulty, ~30 min, DIY cost: $0). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · water heater

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many water heater repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $0.

Other Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater Error Codes

2 FLASH

Thermopile Voltage Low

2 fixes

4 FLASH

Temperature Exceeded High Limit

2 fixes

5 FLASH

Temperature Sensor Failure

2 fixes

7 FLASH

Gas Control Valve Electronics Failure

2 fixes

8 FLASH

Insufficient Thermopile Power

2 fixes

INSUFFICIENT HOT

Not Enough Hot Water — Runs Out Quickly

2 fixes

NO HOT WATER

No Hot Water — Pilot Light Out

2 fixes

RUMBLING

Rumbling or Popping Noises During Heating

2 fixes

People Also Ask About Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater Error 1 BLINK / 3 SEC

What does error code 1 BLINK / 3 SEC mean on a Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater?

Error code 1 BLINK / 3 SEC on the Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater means: Normal Operation. The status LED on the gas control valve blinks once approximately every 3 seconds. This indicates the water heater is operating normally. The electronic gas control is functioning properly and will fire the main burner when the water temperature drops below the thermostat setpoint. This is the expected, healthy state. No action is needed.

How do I fix error code 1 BLINK / 3 SEC on my Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater?

The most successful fix is "No Fix Needed - Normal Operation" (easy difficulty, ~30 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.

Is error code 1 BLINK / 3 SEC on a Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater serious?

This error is rated info severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Can I fix Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater error 1 BLINK / 3 SEC myself?

Yes — the top-ranked community fix ("No Fix Needed - Normal Operation") is rated easy difficulty and takes about 30 minutes. Tools needed: .

How much does it cost to repair Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater error 1 BLINK / 3 SEC?

DIY cost: $0. Professional repair typically costs $0. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater have?

The Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater has 8 other known error codes, including: 2 FLASH (Thermopile Voltage Low), 4 FLASH (Temperature Exceeded High Limit), 5 FLASH (Temperature Sensor Failure), 7 FLASH (Gas Control Valve Electronics Failure), 8 FLASH (Insufficient Thermopile Power), and 3 more.

What other error codes does the Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater have?

The Rheem Rheem Professional Classic 50 Gal. 38,000 BTU Natural Gas Water Heater has 8 other known error codes:

2 FLASH — Thermopile Voltage Low (2 fixes)
4 FLASH — Temperature Exceeded High Limit (2 fixes)
5 FLASH — Temperature Sensor Failure (2 fixes)
7 FLASH — Gas Control Valve Electronics Failure (2 fixes)
8 FLASH — Insufficient Thermopile Power (2 fixes)
INSUFFICIENT HOT — Not Enough Hot Water — Runs Out Quickly (2 fixes)
NO HOT WATER — No Hot Water — Pilot Light Out (2 fixes)
RUMBLING — Rumbling or Popping Noises During Heating (2 fixes)

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