diff --git a/README.adoc b/README.adoc
index 429d292..638442e 100644
--- a/README.adoc
+++ b/README.adoc
@@ -459,7 +459,7 @@ fan_thermal_limit_coefficient: 0
 # report the value from the other side (if available).
 # Useful for builds where you only have one temperature or humidity sensor,
 # and you want to use it for both intake/exhaust.
-sensors_fallback: true
+sensors_fallback: false
 
 # Use the MCU's temperature as an exhaust temperature fallback.
 # Only useful for filters which have the MCU in the exhaust airflow (e.g. StealthMax)
diff --git a/src/sensors.hpp b/src/sensors.hpp
index e32d2d4..af14395 100644
--- a/src/sensors.hpp
+++ b/src/sensors.hpp
@@ -10,7 +10,7 @@ BLE_DECL_SCALAR_OPTIONAL(VOCRaw, uint16_t, 1, 0, 0, 0xFFFFu);  // range [0, 2^16
 
 struct Config {
     // If a sensor in a `FilterSide` is missing, then try to fall back to the other side's sensor.
-    bool fallback = true;
+    bool fallback = false;
     // StealthMax MCU is positioned inside the exhaust airflow.
     // Disabled by default because not all Nevermores are StealthMaxes.
     bool fallback_exhaust_mcu = false;