i now have 3 Tuya thermostats installed and all three have the problem that when they heat, they don’t stop at the target temperature. As an example, the thermostats are set to 15 degrees in automatic mode. The room temperature is 17 degrees. Now I want to heat to 19 degrees. The thermostats open completely and the heating quickly reaches 19 degrees and above but now they don’t switch off automatically.
The thermostats are connected to a c2531 and zigbee2mqtt. Does anyone have a similar problem or do I need to configure something additional?
Yes, I had the same issue. Unfortunately these TRV’s are not compatible with my Honeywell main thermostat which has TPI, they are messing up the TPI calculation.
I have exactly the same problem. What ist the meaning of TPI? Should it be not that easy, that the thermostat turns of on reaching the desired temperature? Is there a specific calculation behind this logic?
I managed to solve the problem. The problem was the TRV using an algorithm for heating depending on a profile for an average room with an average count of windows and draught. It’s possible to disable this algorithm by following the guide by brainzap:
This document describes on page 7 how to disable this algorithm. This guide is in german. For all non german speaking people, here is the translation:
3.1. The thermostat does not close on reaching the desired temperature
The thermostat uses by default an algorithm for temperature control, which is based on
average values for room size, ventilation, windows, …
Sometimes this setting doesn’t work correctly, so it has to be deactivated.
To deactivate this algorithm, you have to carry out the following instructions:
Press the Home symbol () for about 5 seconds (until the symbol lights up).
Release the Home symbol () and press it again for about 10 seconds
Now you are in the settings and the ( ) symbol flashes
Press the (+) symbol until the number 4 lights up and the (SET) symbol flashes.
Confirm by simply pressing the Home Symbol ().
Press the Home Symbol () about 10 times until you see the letter “A” to the right. Below should no blink a “0”.
Press the Plus symbol (+)
Now a “1” should flash
Confirm by simply press the Home Symbol ().
The algorithm is disabled and the thermostat should work correctly.
After Weeks of tests, I can say, that it unfortunately still not works. Although the TRV reports, that it’s not heating, and the valve percentage is 0%, I can hear water flowing through it until I send the OFF command. It’s still heating to the max value until the manual OFF. I try to switch again to mode 0 in the next days and to play around with the max temperatures etc. I’ll report again in the next weeks how it works (or not).
I have same problem. My solution is send force=close and force=normal in automation. Because valve dont close fully if its open on 0%. Full close(force close) and 0% is not same. It seems to me like a bug.
Same for me. Even when lowering the target temperature below the current temperature, the trv sometimes keeps on heating with the same valve position. Excuse me for saying this, but that firmware is really f*cked and I am angry stuff like that is sold to customers.
Also, it seems setting force=normal does not reliably put the trv back to heating mode (sometimes it works, sometimes not). So I am setting the hvac_mode instead, which seems to work reliably.
Here is my automation (example for Zigbee2MQTT if your climate entity is called climate.my_trv):
alias: Close my_trv when target temperature is reached
description: ""
trigger:
- platform: numeric_state
entity_id: climate.my_trv
for:
hours: 0
minutes: 1
seconds: 0
above: -0.1
value_template: >-
{{ state_attr('climate.my_trv', 'current_temperature') -
state_attr('climate.my_trv', 'current_heating_setpoint') }}
action:
- service: select.select_option
data:
option: close
target:
entity_id: select.my_trv_force
- delay:
hours: 0
minutes: 1
seconds: 0
milliseconds: 0
enabled: true
- service: climate.set_hvac_mode
data:
hvac_mode: auto
target:
entity_id: climate.my_trv
mode: single
Good idea and nice insights about unreliable force=normal
In my case I think I want to run your actions only when my climate’s hvac_action changes to off state. Also added an optional condition for thermostat_bedroom_z2m_position==0 just to be sure force close is really needed:
alias: Close a TRV when thermostat was disabled and its position is 0
description: ""
trigger:
- platform: state
entity_id:
- climate.thermostat_bedroom_z2m
to: "off"
attribute: hvac_action
for:
hours: 0
minutes: 2
seconds: 0
condition:
- condition: state
entity_id: sensor.thermostat_bedroom_z2m_position
state: "0"
action:
- service: select.select_option
data:
option: close
target:
entity_id: select.thermostat_bedroom_z2m_force
- delay:
hours: 0
minutes: 1
seconds: 0
enabled: true
- service: climate.set_hvac_mode
data:
hvac_mode: auto
target:
entity_id: climate.thermostat_bedroom_z2m
mode: single
I wanted to add that I read somewhere about this problem, apparently the TRV’s motor is either not strong enough tu fully close the valve (i.e. push the pin) or its own pin is the wrong length so some people suggested sticking a tiny magnet i.e. 4mm diameter, 2mm thickness onto the TRV’s pin and then recalibrate.
Sounds plausible to me and will test this weekend. Basically, if the TRV doesn’t manage to fully push that pin then when it calibrates itself it will set the deepest it can push that pin to position: 0% thinking that is the furthest it can go.
I had the same problem for months until i figured it out (it was actually written on the manual i got with the TRV). On the TRV itself, there is setting “C” (settings on my Tuya TS0601 TRV [manufacturer model: _TZE200_cpmgn2cf] go 1-9, and then A-C), with modes:
“0 - soft close”, and
“1 - hard close”.
The default setting for this TRV is unfortunately “0” which does not fully close the valve. When set to “1” it works as it should. Hope it helps someone.
im using TS0601 (_TZE200_hue3yfsn) and have the same problem. If i set heating to off the valve is not fully closed.
I have 3 Switches exposed to my home-assistant. Following the diagram on TS0601 unusual switch and functions the 3rd Switch is “On/Off” Switch. But do i alos have to set this Switch to off, if i want the valve to be fully closed?
On my end, I feel that when the radiator is hot, the motor struggles to close the valve. So I wait until the radiator is super hot (valve open), then I remove the batteries and put them back again to reset the valve position.
Now it works (let’s see if it will continue to work after several days).
I’d be interested to know if there’s a way to trigger the reset of the valve position without removing the batteries. With the buttons only?
Hello, i think that it must to set up another option, when TRV show 0% valve, but valve itself is not closed. My TRV has more options in advanced menu. It has AA, AB and AC
Meanings:
AA - control type of valve - 0: PID 1: ON/OFF
AB - Reset
AC - valve seal type 0:soft 1:hard
i do not have AC, or C setting, only A and small b.
i tried everything regarding this. i tried also doing an automation from samples provided here, but it was never triggered, dont know why. Commands were not executed, even when i tried launching automation manually.Also, it looks like force mode is not possible and i can see only “change hvac mode” as available commands when calling a service on my entities. using OFF, does not change anything, valve does not close. also, when i hit OFF on a thermostat widget in HA. nothing changes. are you guys using official tuya integration or something else?
) for about 5 seconds (until the symbol lights up).
) symbol flashes
