# AGA Error Code 140

> AGA error code 140 — Configuration key fault. Which models show it, what causes it and how it is fixed. Mon–Sun 8:00AM–8:00PM. Call or text 206-427-7323.

Configuration key fault — what this fault code means on AGA TEK / Tekelek PCB fault codes, and how we fix it.

**Fault code** · AGA TEK / Tekelek PCB fault codes · Configuration

## What code 140 means

Configuration key fault

Reported per: All.

## Which models show it

- [AGA Classic eR7](https://aga.repair/aga-classic-er7-repair)
- [AGA Classic 39" Total Control](https://aga.repair/aga-classic-total-control-repair)
- [AGA ERA](https://aga.repair/aga-era-repair)

Models: eR7 100, eR7 150, ATC3-*, AGA ERA

## Components that usually cause this code

- [AGA PCB electrical supply configuration key](https://aga.repair/aga-config-key-replacement) (control)

## How it is fixed

No configuration key fitted to the board, or the wrong key for the phase of electrical supply the cooker is connected to. With controls in standby it is possible to display the configuration key against the connected phase supply. See TB 30.01.14.

> ⚠️ **Safety & DIY disclaimer:** guides on this site are for information only. Appliance repair involves 240V electricity, gas connections, refrigerant and heavy cast-iron parts — anything you do yourself is at your own risk and can damage the appliance or cause injury. The safe option is to book a qualified technician.

## Problems linked to this code

- [AGA configuration key fault (code 140)](https://aga.repair/aga-config-key)

## More codes on this platform

- [002 — Com WD Fault (communication watchdog)](https://aga.repair/aga-error-code-002)
- [003 — Com WD Fault (communication watchdog)](https://aga.repair/aga-error-code-003)
- [004 — Not used](https://aga.repair/aga-error-code-004)
- [005 — Not used](https://aga.repair/aga-error-code-005)
- [006 — WD WDT Fault (watchdog timer)](https://aga.repair/aga-error-code-006)
- [007 — TC Ref Fault — the user panel PCB is unable to process thermocouple measurements](https://aga.repair/aga-error-code-007)
- [010-014 — Full power time out — the cooking zone is taking too long to reach its expected temperature. This is a safety feature, not necessarily a component failure.](https://aga.repair/aga-error-code-010-014)
- [020-024 — Thermocouple differential — the two thermocouples in a zone disagree](https://aga.repair/aga-error-code-020-024)
- [060-100 — Thermocouple open circuit](https://aga.repair/aga-error-code-060-100)
- [110-116 — Relay short circuit](https://aga.repair/aga-error-code-110-116)
- [120-124 — Cooking zone overheat error](https://aga.repair/aga-error-code-120-124)
- [130-136 — Triac fault](https://aga.repair/aga-error-code-130-136)
- [139 — User panel overheat — excessive temperatures recorded at the control panel](https://aga.repair/aga-error-code-139)
- [150-156 — Relay open circuit](https://aga.repair/aga-error-code-150-156)
- [159 — RF fault — receiver not communicating with the PCB](https://aga.repair/aga-error-code-159)

## Frequently asked questions

### What does AGA error code 140 mean?

Configuration key fault

### Can I keep using my AGA with code 140?

A power cycle at the breaker (60 seconds) may clear a one-off code. If the code returns, stop using the affected zone or appliance and book service — continuing to run can turn a small fault into a board-level repair.

---

## Book a repair

- Call or text: 206-427-7323 (Mon–Sun 8:00AM–8:00PM, Pacific Time)
- Book online: https://aga.repair/contact/
- Email: service@aga.repair
- Service at your home across the Seattle–Tacoma metro, WA. Diagnostic fee applies toward your repair.

Independent service company — not affiliated with or authorized by AGA / AGA Rangemaster (Middleby). We repair out-of-warranty AGA appliances.