From 8638424d5b6d53dc9689ba398693c0ca465a142b Mon Sep 17 00:00:00 2001
From: MichaelDvP <github@mdvp.de>
Date: Mon, 6 Jul 2026 17:00:12 +0200
Subject: [PATCH] fix water circulation for dhw circuits 1/2

---
 src/devices/water.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/devices/water.cpp b/src/devices/water.cpp
index e33c4c157..ce4188631 100644
--- a/src/devices/water.cpp
+++ b/src/devices/water.cpp
@@ -361,8 +361,11 @@ bool Water::set_wwCircTc(const char * value, const int8_t id) {
     if (!Helpers::value2bool(value, b)) {
         return false;
     }
-    write_command(0x7A5, 4, b ? 0xFF : 0x00, 0x7A5);
-    return true;
+    if (flags() == EMSdevice::EMS_DEVICE_FLAG_MMPLUS) {
+        write_command(0x33B + dhw_, 4, b ? 0x01 : 0x00, 0x33B + dhw_);
+    } else { // SM100
+        write_command(0x7A5, 4, b ? 0xFF : 0x00, 0x7A5);
+    }    return true;
 }
 
 bool Water::set_wwKeepWarm(const char * value, const int8_t id) {