This guide covers common issues with the WTH (Wireless Temperature Hub) and how to resolve them. If a problem persists after trying the steps below, contact LF Audio support by email.
Power Issues
| Issue | Solution |
|---|---|
| The hub does not turn on | Confirm the power source is live and the screw-terminal connections are tight. The hub has no internal battery, so it needs a wired supply to run. |
| The hub does not turn on and wiring looks correct | Double-check polarity: the positive lead must go to the positive terminal and ground to the ground terminal. Reversed wiring can prevent the hub from starting. |
| The hub turned off unexpectedly | Check that the power source is still on and the wiring has not worked loose. If you use a switched supply, confirm it is currently powered. If an inline fuse is fitted, check it. |
| Intermittent power | Inspect the screw-terminal connections and the wire run for a loose or chafed connection. Secure the wiring so it cannot vibrate loose. |
A Channel Reads Nothing
A blank channel means the hub is not getting a valid reading from a sensor there. Work through these steps:
| Step | What to Do |
|---|---|
| Give it a moment | The hub detects sensors automatically. After connecting a sensor, allow a few seconds for its channel to appear. |
| Reseat the sensor | Unplug the sensor and firmly replug it into its port. |
| Check placement | For an infrared sensor pod, aim it squarely at the surface from a short distance. For a contact probe, make sure the tip has firm, direct contact with the surface. |
| Swap ports | Move the sensor to another port of the same type. If it reads there, the original port is suspect. |
| Swap sensors | Try a different sensor of the same type in the original port. If the new one reads, the original sensor is the problem. |
Readings Look Wrong
| Issue | Solution |
|---|---|
| A contact probe reads lower than expected | The probe may not be making firm, direct contact. A probe touching paint, a coating, or an air gap reads low. Reattach it for solid contact. |
| An infrared reading seems off | An infrared pod reads whatever fills its view. Aim it squarely at the specific surface you care about, from a short distance, and keep other hot or cold objects out of its line of sight. |
| A reading is unexpectedly high (orange or red) | Confirm the sensor really is on the surface you intend. If it is, the color scale is doing its job: that surface is running hot and is worth investigating. |
| Everything reads oddly cool or oddly warm | Remember all readings are in Fahrenheit. Compare a channel against a known reference to confirm the sensor and placement. |
App Can't Find the Hub
| Issue | Solution |
|---|---|
| The hub does not appear when scanning | Confirm the hub has power and its screen is on, that your phone's Bluetooth is enabled, and that the phone is close to the hub. |
| The hub is already connected elsewhere | Bluetooth links to one phone at a time. Disconnect the hub from any other phone, then scan again. |
| Pairing does not complete | Keep the phone right next to the hub, and accept any pairing confirmation your phone shows. Restart the hub (below) and try again. |
| The app connects then drops | Move the phone closer to the hub and away from other sources of interference. The app link is only needed for configuration and updates; the hub keeps displaying temperatures regardless. |
Firmware Update Issues
| Issue | Solution |
|---|---|
| WiFi network not found during an update | The hub uses 2.4 GHz WiFi only. Confirm the network is 2.4 GHz, in range, and that the name and password entered in the app are correct. |
| Only 5 GHz WiFi is available | Most routers broadcast both bands under one name; confirm 2.4 GHz is not disabled. If the network is 5 GHz only, enable a 2.4 GHz hotspot on your phone for the update. |
| Connects but cannot reach the update server | Make sure the network has working internet access and is not a guest or captive-portal network that requires a browser login. Try a different network. |
| The update stops partway | A failed update does not affect the firmware already installed. Retry with a stronger WiFi signal, keeping the hub close to the router or hotspot. |
| The update server reports it is busy | Wait a few minutes, then retry from the app. |
See Firmware Updates for the full update workflow.
Restarting the Hub
If the hub becomes unresponsive or the screen misbehaves, restart it:
- Press and hold the physical button for about two seconds
- The hub restarts and resumes monitoring on power-up
If holding the button does not help, remove power from the hub, wait a few seconds, then reapply power.
Display Issues
| Issue | Solution |
|---|---|
| Screen is dark but the hub has power | Restart the hub by holding the button for about two seconds. If it stays dark after a restart and a full power-cycle, contact LF Audio support. |
| Readings are frozen or the screen looks stuck | Restart the hub. If the problem returns, note when it happens and contact LF Audio support. |
Contacting Support
LF Audio support is handled by email. When you reach out, include:
- Your hub's current firmware version (shown in the LF Audio AuralSync app)
- A description of the issue and which channels or sensors are affected
- The steps you have already tried from this guide
This helps support resolve your issue as quickly as possible. For confirming which part of the system is at fault before you write in, see System Diagnostics.