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Skytech Error Code 4 Beeps Every Second: Sensor safety – flame sensed before ignition (Gas Fireplace)

Updated · by Aurora Star Tech Inc.

Skytech error code 4 Beeps Every Second on a gas fireplace means: Sensor safety - flame sensed before ignition. It is also called Skytech diagnostic code 4 Beeps Every Second.

Medium severityGas FireplaceAF-4000

Homeowner? What Skytech code 4 Beeps Every Second means for you

Check, then call Your gas fireplace is reporting: Sensor safety - flame sensed before ignition. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.

Safe things you can check yourself

  • Replace the batteries in the remote and in the receiver or battery pack (weak batteries are the most common cause).
  • Make sure the wall switch is ON and the fireplace has power if it uses a plug-in adapter.
  • Check that the gas valve to the fireplace is open (handle in line with the pipe).
  • If you smell gas, do not try to light it: leave the house and call your gas utility or 911 from outside.

Call (647) 657-2977Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Skytech error code 4 Beeps Every Second mean?

The pilot flame sensor sees a flame when an ignition sequence starts, or the sensor is shorted to ground.

Applies to: Skytech AF-4000 MOD-1, AF-4000 MOD A and SMART MOD remote modules (used on many fireplace brands)

Common causes of Skytech code 4 Beeps Every Second

  • Pilot flame actually present with the valve off (valve not closing)
  • Flame sensor shorted to ground
  • Failed pilot assembly or module
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Skytech models that use code 4 Beeps Every Second

AF-4000 MOD-1AF-4000 MOD ASMART MOD

Other Skytech Gas Fireplace codes

CodeMeaning
1 Beep Every 4 SecondsCommunication safety - remote and receiver not talking
1 Beep Every SecondIgnition safety - pilot did not light in 60 seconds
4 Beeps Every 2 SecondsThermal safety - module overheated

All Skytech Gas Fireplace error codes →

Skytech code 4 Beeps Every Second: homeowner questions

What does Skytech code 4 Beeps Every Second mean?

Sensor safety - flame sensed before ignition. The pilot flame sensor sees a flame when an ignition sequence starts, or the sensor is shorted to ground.

Is it safe to keep using my gas fireplace with code 4 Beeps Every Second?

It depends on the cause. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.

Can I reset Skytech code 4 Beeps Every Second myself?

You can try one reset (power off for 30 seconds, then on). If Skytech code 4 Beeps Every Second comes back, the cause is still there and a licensed technician should check it.

Who can fix Skytech code 4 Beeps Every Second near me?

Aurora Star Tech Inc. repairs Skytech gas fireplaces in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: Gas Fireplace Won't Light or Stay Lit

Troubleshooting guides

Source: Skytech Audible Alerts & Error Codes for AF-4000 MOD-1 / MOD A / SMART MOD, p.2-3. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

Emergency HVAC Service

647-657-2977