HIGH URGENCY

Trane Furnace 7 Flashes — Gas Valve Circuit Problem

7 flashes

Gas valve circuit problem — wiring, coil, or board fault.

Brand: Trane (Also covers American Standard) | Equipment: Gas Furnace

What This Code Means

7 flashes means the control detects a problem in the gas valve circuit. Either the valve coil is failed, the wiring is bad, or the board can't drive the valve properly.

Likely Causes (Ranked)

Common

Failed gas valve coil

What: Internal coil failure prevents proper operation.

How to check: Tech tests coil resistance.

Fix: Replace gas valve.

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Common

Wiring fault

What: Broken or loose wire at the gas valve.

How to check: Inspect gas valve wiring connections.

Fix: Repair wiring.

Less common

Bad control board

What: Board can't drive gas valve circuit.

How to check: Tech diagnostic.

Fix: Replace board.

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Diagnostic Steps

Cut power
Inspect gas valve wiring
If wiring OK, call HVAC tech for valve/board diagnostic

Frequently Asked Questions

Can I fix Trane 7 flashes myself?

Visual wiring inspection OK. Valve replacement is professional.

What's the cost?

Wiring: free. Gas valve: $150-300 plus labor.

Same on American Standard?

Yes.

Related Trane Codes

Related Symptoms

Need More Help?

Try our interactive symptom diagnostic tool or browse Trane parts.

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