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7 Flashes

A.O. Smith · GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition

A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition 7 Flashes Error Fix: Gas Control Valve Failure

The electronic gas control valve has an internal failure. The valve is unable to regulate gas flow to the pilot or main burner. This is a non-repairable component — the entire gas control valve assembly must be replaced. Turn off the gas supply to the water heater. Do not attempt to repair the gas valve. Contact a licensed plumber to install the correct replacement gas control valve for your model.

critical2 fixes available✨ Free fix available

Quick Answer

Error 7 Flashes on the A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition means: Gas Control Valve Failure. The top-ranked community fix is “Replace the Electronic Gas Control Valve Assembly” (hard difficulty, ~120 min, DIY cost: $200-$250). 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: $400-$600.

Other A.O. Smith Models with Error 7 Flashes

GCR-40 ProLine 40 Gal 38,000 BTU ProLine Gas Water Heater with Energy Saver

water_heater · 2 fixes

GPVL-50 ProLine XE 50 Gal 38,000 BTU ProLine XE Power Vent Gas Water Heater

water_heater · 2 fixes

GPVT-50 Power Vent 50 Gal 38,000 BTU Power Vent Gas Water Heater with Electronic Ignition

water_heater · 2 fixes

Other A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition Error Codes

1 Flash

Normal Operation

2 fixes

2 Flashes

Thermopile Voltage Low

2 fixes

4 Flashes

Temperature Exceeded High Limit

2 fixes

5 Flashes

Temperature Sensor Failure

2 fixes

8 Flashes

Loss of Pilot Signal

2 fixes

People Also Ask About A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition Error 7 Flashes

What does error code 7 Flashes mean on a A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition?

Error code 7 Flashes on the A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition means: Gas Control Valve Failure. The electronic gas control valve has an internal failure. The valve is unable to regulate gas flow to the pilot or main burner. This is a non-repairable component — the entire gas control valve assembly must be replaced. Turn off the gas supply to the water heater. Do not attempt to repair the gas valve. Contact a licensed plumber to install the correct replacement gas control valve for your model.

How do I fix error code 7 Flashes on my A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition?

The most successful fix is "Replace the Electronic Gas Control Valve Assembly" (hard difficulty, ~120 minutes). Estimated DIY cost: $200-$250. HomeMD has 2 community-ranked fixes for this error.

Is error code 7 Flashes on a A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition serious?

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

Can I fix A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition error 7 Flashes myself?

Yes — the top-ranked community fix ("Replace the Electronic Gas Control Valve Assembly") is rated hard difficulty and takes about 120 minutes. Tools needed: T20 Torx screwdriver, Adjustable wrench, Gas leak detector or soapy water spray, Non-contact voltage tester, Work gloves, Safety glasses.

How much does it cost to repair A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition error 7 Flashes?

DIY cost: $200-$250. Professional repair typically costs $400-$600. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition have?

The A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition has 5 other known error codes, including: 1 Flash (Normal Operation), 2 Flashes (Thermopile Voltage Low), 4 Flashes (Temperature Exceeded High Limit), 5 Flashes (Temperature Sensor Failure), 8 Flashes (Loss of Pilot Signal).

Which other A.O. Smith models have the 7 Flashes error?

Error code 7 Flashes also appears on 3 other A.O. Smith models: GCR-40 ProLine 40 Gal 38,000 BTU ProLine Gas Water Heater with Energy Saver, GPVL-50 ProLine XE 50 Gal 38,000 BTU ProLine XE Power Vent Gas Water Heater, GPVT-50 Power Vent 50 Gal 38,000 BTU Power Vent Gas Water Heater with Electronic Ignition. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition have?

The A.O. Smith GNVR-50 ProMax Gas 50 Gal 40,000 BTU ProMax Gas Water Heater with Electronic Ignition has 5 other known error codes:

1 Flash — Normal Operation (2 fixes)
2 Flashes — Thermopile Voltage Low (2 fixes)
4 Flashes — Temperature Exceeded High Limit (2 fixes)
5 Flashes — Temperature Sensor Failure (2 fixes)
8 Flashes — Loss of Pilot Signal (2 fixes)

Which other A.O. Smith models have the 7 Flashes error?

Error code 7 Flashes also appears on 3 other A.O. Smith models:

GCR-40 ProLine 40 Gal 38,000 BTU ProLine Gas Water Heater with Energy Saver (water heater) · 2 fixes
GPVL-50 ProLine XE 50 Gal 38,000 BTU ProLine XE Power Vent Gas Water Heater (water heater) · 2 fixes
GPVT-50 Power Vent 50 Gal 38,000 BTU Power Vent Gas Water Heater with Electronic Ignition (water heater) · 2 fixes

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