#Better Thermostat drops the temperature to 5°C short after midnight

6 messages · Page 1 of 1 (latest)

keen roost
#

I'm running Home Assistant with 7 TRVs controlled by Better Thermostat. Unfortunately, shortly after midnight (around 00:06), the target temperature on some of them is set to 5°C (see attached screenshot).

I don't have any automation that should/could cause this. Moreover, when I deleted the Better Thermostat device for one of the problematic ones and used direct thermostat control, the issue disappeared (for that single thermostat).

Can anyone help me identify what is causing the temperature change?

P.S. Last night I gathered the events around that time and I found following event:
event_type: call_service
data:
domain: climate
service: set_temperature
service_data:
entity_id: climate.asia_termostat
temperature: 5
origin: LOCAL
time_fired: "2025-02-25T23:06:26.080683+00:00"
context:
id: 01JMWV79BNSKFEVWA9YN01V218
parent_id: null
user_id: null

How can I identify what sends this event?

image.png
frail chasm
#

It doesn't look to be an automation (they have the parent_id set)
What are your trvs, do they have an "Auto" mode?

keen roost
#

I have the issue with TRV-601 : https://www.zigbee2mqtt.io/devices/TRV601.html#tuya-trv601
All are in manual mode.

What may be relevant just before (few millisecunds) the set_temperature event (time_fired: "2025-02-25T23:06:26.080683+00:00")
there was one more request: service: set_hvac_mode (time_fired: "2025-02-25T23:06:26.077617+00:00")
event_type: call_service
data:
domain: climate
service: set_hvac_mode
service_data:
entity_id: climate.asia_termostat
hvac_mode: auto
origin: LOCAL
time_fired: "2025-02-25T23:06:26.077617+00:00"
context:
id: 01JMWV79BNSKFEVWA9YN01V218
parent_id: null
user_id: null

image.png
Tuya TRV601 control via MQTT | Zigbee2MQTT

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frail chasm
#

Hmmm yes that definitely looks like the root cause, I'm not sure why better Thermostat would be putting the trv into Auto mode

#

Have you had a look on the github repo for similar issues?

keen roost
#

Sure 🙂 - unfortunately I haven't found anything which looks as the similar root case.
I will keep investigating.