How to Restore Communications With Your QFM

How to Restore Communications With Your QFM

QFMs connect to Wi-Fi and report sensor readings to qfmonitoring.com every 5 minutes, and check for new settings every 15 minutes. If a QFM hasn’t reported in 3 hours, it is marked Inactive. Sensor readings are still saved to the onboard SD card during a comms outage and uploaded once the device reconnects, so no data is lost.

Communication problems are most often power problems — work through the steps below in order.

About the live status display: if the QFM Unit Information page shows a yellow “last seen” warning, that’s an early heads-up. Units are only marked Inactive after 3 hours of silence.

1. Check Power

  1. Confirm the fan is powered. The QFM control box gets 24 VDC from the fan motor — if the fan motor is not powered, the control box cannot communicate.
  2. Confirm there is no damage to the cable between the fan motor and the control box.
  3. Power-cycle the control box. We recommend leaving power off for 3–5 minutes, because an on-board capacitor keeps the control box running briefly through quick power outages. You can either:
    • Switch the electrical circuit off, or
    • Disconnect the cable between the fan motor and the control box.

2. Check the Network

Confirm your network can reach qfmonitoring.com. Each control box requires:

  • A DHCP-assigned IP address (static IPs are not supported)
  • 2.4 GHz Wi-Fi — 5 GHz is not supported, and Wi-Fi 6E / Wi-Fi 7-only networks are not supported
  • Band steering disabled, or a dedicated 2.4 GHz SSID
  • WPA2-Personal security — WPA3, Enterprise, and open captive-portal networks are not supported

3. Initial Setup or Reconfiguration

If the QFM has never been programmed for your network — or if your network credentials have changed — you’ll need to bring it back through the factory setup network first.

Out of the box, every QFM control box broadcasts and connects to:

  • SSID: QF_Config
  • Password: 12!@34#$56%^78&*90()

This is the factory bootstrap network only. Once configured, the QFM joins your Wi-Fi and these credentials no longer apply to that unit.

Once the unit is connected through QF_Config to qfmonitoring.com, you can reprogram the control box (or all of your QFMs) to your desired credentials from your dashboard. See this short video: https://www.youtube.com/watch?v=ofJhqg-sVNA

Note: reprogramming requires a qfmonitoring.com account. If you don’t have one, contact your installer or QuickFreeze support.

For more detail, see our QFM Networking Information Sheet.

4. Still Not Working?

If you’ve worked through the steps above and the unit is still Inactive, contact support@quickfreeze.com with the QFM serial number (printed on the QR tag on the side of the unit).