diff --git a/stm-firmware/include/reflow-controller/adc-meas.h b/stm-firmware/include/reflow-controller/adc-meas.h
index 6f16df4..f0e764e 100644
--- a/stm-firmware/include/reflow-controller/adc-meas.h
+++ b/stm-firmware/include/reflow-controller/adc-meas.h
@@ -47,7 +47,7 @@
 /**
  * @brief Difference in Ohm between filter input and output that determines if the filter is stable or unstable.
  */
-#define ADC_PT1000_FILTER_UNSTABLE_DIFF 10
+#define ADC_PT1000_FILTER_UNSTABLE_DIFF 20
 
 /**
  * @brief Sample count, the moving average filter has to be within @ref ADC_PT1000_FILTER_UNSTABLE_DIFF for the filter