Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater GV Error Fix: Gas Valve Fault

The gas valve is not operating correctly — the valve is not opening, not closing, or not responding to the control board signal; gas valve failure requires professional service; do not attempt to disassemble the gas valve; verify gas supply is present and check electrical connections to the valve before replacing

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error GV on the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater means: Gas Valve Fault. The top-ranked community fix is “Replace Faulty Gas Valve Assembly” (hard difficulty, ~90 min, DIY cost: $20-$40). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · pool 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 pool 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: $250-$400.

Other Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater Error Codes

AFC

Airflow Current Fault

Air/Gas Switch Fault

Communication Error

Flue Exhaust Fault

Flow Fault — Insufficient Water Flow

2 fixes

HLS

High Limit Switch Tripped

Ignition Failure

Polymer Header Crack (LXi-Specific)

2 fixes

People Also Ask About Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater Error GV

What does error code GV mean on a Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater?

Error code GV on the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater means: Gas Valve Fault. The gas valve is not operating correctly — the valve is not opening, not closing, or not responding to the control board signal; gas valve failure requires professional service; do not attempt to disassemble the gas valve; verify gas supply is present and check electrical connections to the valve before replacing

How do I fix error code GV on my Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater?

The most successful fix is "Replace Faulty Gas Valve Assembly" (hard difficulty, ~90 minutes). Estimated DIY cost: $20-$40. HomeMD has 2 community-ranked fixes for this error.

Is error code GV on a Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater error GV myself?

Yes — the top-ranked community fix ("Replace Faulty Gas Valve Assembly") is rated hard difficulty and takes about 90 minutes. Tools needed: Adjustable wrench, Nut driver set (3/8 inch), Pipe thread sealant, Multimeter.

How much does it cost to repair Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater error GV?

DIY cost: $20-$40. Professional repair typically costs $250-$400. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater have?

The Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater has 8 other known error codes, including: AFC (Airflow Current Fault), AGS (Air/Gas Switch Fault), CE (Communication Error), FE (Flue Exhaust Fault), FLO (Flow Fault — Insufficient Water Flow), and 3 more.

What other error codes does the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater have?

The Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater has 8 other known error codes:

AFC — Airflow Current Fault (2 fixes)
AGS — Air/Gas Switch Fault (2 fixes)
CE — Communication Error (2 fixes)
FE — Flue Exhaust Fault (2 fixes)
FLO — Flow Fault — Insufficient Water Flow (2 fixes)
HLS — High Limit Switch Tripped (2 fixes)
IGN — Ignition Failure (2 fixes)
MECH-01 — Polymer Header Crack (LXi-Specific) (2 fixes)

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