diff --git a/web/app.js b/web/app.js
index 569bb14..9cc9d14 100644
--- a/web/app.js
+++ b/web/app.js
@@ -32,6 +32,7 @@ let initialPowerSync = true;
 let initialSpeedSync = true;
 let initialHeatrateSync = true;
 let initialTempSollSync = true;
+let initialPotTempSync = true;
 
 let ambientTemp = null;
 let warpFactor = 1.0;
@@ -702,6 +703,10 @@ function onSystemChanged(msg) {
 		if (document.activeElement !== document.getElementById('ambient-temp')) {
 			document.getElementById('ambient-temp').value = msg.AmbientTemp;
 		}
+		if (initialPotTempSync) {
+			document.getElementById('pot-temp').value = msg.AmbientTemp;
+			initialPotTempSync = false;
+		}
 		updateEnvStatusLine();
 	}
 	if ('WarpFactor' in msg) {
@@ -755,6 +760,7 @@ function connect() {
 		initialSpeedSync = true;
 		initialHeatrateSync = true;
 		initialTempSollSync = true;
+		initialPotTempSync = true;
 		setConnected(true);
 		for (const channel of CHANNELS) {
 			ws.send(JSON.stringify({'+': channel}));