diff --git a/applications/solvers/combustion/reactingFoam/pEqn.H b/applications/solvers/combustion/reactingFoam/pEqn.H
index 81ab6424b4..36f3e77753 100644
--- a/applications/solvers/combustion/reactingFoam/pEqn.H
+++ b/applications/solvers/combustion/reactingFoam/pEqn.H
@@ -92,9 +92,10 @@ K = 0.5*magSqr(U);
 if (pressureControl.limit(p))
 {
     p.correctBoundaryConditions();
-    rho = thermo.rho();
 }
 
+rho = thermo.rho();
+
 if (thermo.dpdt())
 {
     dpdt = fvc::ddt(p);
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/system/bottomAir/fvSolution b/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/system/bottomAir/fvSolution
index 1185c9d7c4..51011f702c 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/system/bottomAir/fvSolution
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/system/bottomAir/fvSolution
@@ -62,6 +62,8 @@ PIMPLE
     momentumPredictor   yes;
     nCorrectors         2;
     nNonOrthogonalCorrectors 0;
+    pRefCell    0;
+    pRefValue   1e5;
 }
 
 relaxationFactors
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/system/topAir/fvSolution b/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/system/topAir/fvSolution
index 1185c9d7c4..51011f702c 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/system/topAir/fvSolution
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater/system/topAir/fvSolution
@@ -62,6 +62,8 @@ PIMPLE
     momentumPredictor   yes;
     nCorrectors         2;
     nNonOrthogonalCorrectors 0;
+    pRefCell    0;
+    pRefValue   1e5;
 }
 
 relaxationFactors
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/windshieldDefrost/system/cabin/fvSolution b/tutorials/heatTransfer/chtMultiRegionFoam/windshieldDefrost/system/cabin/fvSolution
index 0eabd4031a..6dc2762c5a 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/windshieldDefrost/system/cabin/fvSolution
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/windshieldDefrost/system/cabin/fvSolution
@@ -66,6 +66,8 @@ PIMPLE
     momentumPredictor no;
     nCorrectors     1;
     nNonOrthogonalCorrectors 0;
+    pRefCell    0;
+    pRefValue   1e5;
 }
 
 relaxationFactors
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/windshieldDefrost/system/ice/fvSolution b/tutorials/heatTransfer/chtMultiRegionFoam/windshieldDefrost/system/ice/fvSolution
index 0c2e7c9b8b..afd8468ca6 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/windshieldDefrost/system/ice/fvSolution
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/windshieldDefrost/system/ice/fvSolution
@@ -82,6 +82,8 @@ PIMPLE
     momentumPredictor no;
     nCorrectors     1;
     nNonOrthogonalCorrectors 0;
+    pRefCell    0;
+    pRefValue   1e5;
 }
 
 relaxationFactors