Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -r830213bc6dcc1a684610caf78c79d55f2cb41e93 -rbd896114f304304a7096b30b2a85067a64645e82
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 830213bc6dcc1a684610caf78c79d55f2cb41e93)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision bd896114f304304a7096b30b2a85067a64645e82)
@@ -7,8 +7,8 @@
 *
 * @file    Heaters.c
 *
-* @author  (last)      Vinayakam Mani
-* @date    (last)      18-Sep-2025
+* @author  (last)      Michael Garthwaite
+* @date    (last)      13-Jan-2026
 *
 * @author  (original)  Vinayakam Mani
 * @date    (original)  11-Oct-2024
@@ -404,7 +404,11 @@
     if ( ++primaryTargetTempAdjCounter >= D5_TARGET_TEMP_ADJUST_INTERVAL_MS )
     {
         F32 targetTempfromTD            = getTDTargetDialysateTemperature();
+#ifdef __TEENSY_CONDUCTIVITY_DRIVER__
+        F32 measuredTempAtDialyzer      = getTeensyConductivityTemperatureValue( D27_COND );
+#else
         F32 measuredTempAtDialyzer      = getConductivityTemperatureValue( D27_COND );
+#endif
         F32 calcTargetTemp              = getHeaterTargetTemperature( D5_HEAT );
         F32 dialysateFlowrate           = getTDDialysateFlowrate();
         F32 deltaTempC                  = targetTempfromTD - measuredTempAtDialyzer;