diff --git a/CHANGELOG.md b/CHANGELOG.md
index 33098b858f..223be89be4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -125,6 +125,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix scheduling at Evcs with more than one Ev at a time without Em [#787](https://github.com/ie3-institute/simona/issues/787)
 - Fix CheckWindow duration [#921](https://github.com/ie3-institute/simona/issues/921)
 - Fixed ThermalStorageResults having multiple entries [#924](https://github.com/ie3-institute/simona/issues/924)
+- Fix filter for thermal result checking for lastTick not for currentTick [#1008](https://github.com/ie3-institute/simona/issues/1008)
 
 ## [3.0.0] - 2023-08-07
 
diff --git a/src/main/scala/edu/ie3/simona/agent/participant/hp/HpAgentFundamentals.scala b/src/main/scala/edu/ie3/simona/agent/participant/hp/HpAgentFundamentals.scala
index b95d25671d..9094058deb 100644
--- a/src/main/scala/edu/ie3/simona/agent/participant/hp/HpAgentFundamentals.scala
+++ b/src/main/scala/edu/ie3/simona/agent/participant/hp/HpAgentFundamentals.scala
@@ -188,7 +188,7 @@ trait HpAgentFundamentals
     )
 
     val accompanyingResults = baseStateData.model.thermalGrid.results(
-      tick,
+      updatedState.tick,
       updatedState.thermalGridState,
     )(baseStateData.startDate)
     val result = AccompaniedSimulationResult(power, accompanyingResults)
@@ -253,8 +253,8 @@ trait HpAgentFundamentals
       relevantData,
     )
     val accompanyingResults = baseStateData.model.thermalGrid.results(
-      currentTick,
-      lastModelState.thermalGridState,
+      updatedState.tick,
+      updatedState.thermalGridState,
     )(baseStateData.startDate)
     val result = AccompaniedSimulationResult(power, accompanyingResults)
 
diff --git a/src/main/scala/edu/ie3/simona/model/participant/HpModel.scala b/src/main/scala/edu/ie3/simona/model/participant/HpModel.scala
index 4d9fc68899..37cd4b1a8e 100644
--- a/src/main/scala/edu/ie3/simona/model/participant/HpModel.scala
+++ b/src/main/scala/edu/ie3/simona/model/participant/HpModel.scala
@@ -325,9 +325,9 @@ object HpModel {
     * temperature.
     *
     * @param isRunning
-    *   indicates if CHP is turned on
-    * @param lastTimeTick
-    *   contains last time tick
+    *   indicates if HP is turned on
+    * @param tick
+    *   the time tick of the HpState
     * @param ambientTemperature
     *   Optional ambient temperature, if available
     * @param activePower
@@ -342,7 +342,7 @@ object HpModel {
     */
   final case class HpState(
       isRunning: Boolean,
-      lastTimeTick: Long,
+      tick: Long,
       ambientTemperature: Option[Temperature],
       activePower: Power,
       qDot: Power,
diff --git a/src/test/scala/edu/ie3/simona/agent/participant/HpAgentModelCalculationSpec.scala b/src/test/scala/edu/ie3/simona/agent/participant/HpAgentModelCalculationSpec.scala
index 3ff4229ab7..03007b225a 100644
--- a/src/test/scala/edu/ie3/simona/agent/participant/HpAgentModelCalculationSpec.scala
+++ b/src/test/scala/edu/ie3/simona/agent/participant/HpAgentModelCalculationSpec.scala
@@ -506,7 +506,7 @@ class HpAgentModelCalculationSpec
                     _,
                     HpState(
                       isRunning,
-                      lastTimeTick,
+                      tick,
                       _,
                       activePower,
                       qDot,
@@ -516,7 +516,7 @@ class HpAgentModelCalculationSpec
                   )
                 ) =>
               isRunning shouldBe false
-              lastTimeTick shouldBe 0L
+              tick shouldBe 0L
               activePower should approximate(Kilowatts(0.0))
               qDot should approximate(Kilowatts(0.0))
 
@@ -634,7 +634,7 @@ class HpAgentModelCalculationSpec
                     _,
                     HpState(
                       isRunning,
-                      lastTimeTick,
+                      tick,
                       _,
                       activePower,
                       qDot,
@@ -644,7 +644,7 @@ class HpAgentModelCalculationSpec
                   )
                 ) =>
               isRunning shouldBe false
-              lastTimeTick shouldBe 0L
+              tick shouldBe 0L
               activePower should approximate(Kilowatts(0d))
               qDot should approximate(Kilowatts(0d))