ESPHome disable turn off option of a thermostat

ESPHome
1

Hello everyone, i’m using two esphome thermostats on a nodemcu v3 (esp8266) to control a central heating system. The system works like this:
The wood burner has a boiler and when the water reaches a temperature (in my case 57-60C) a pump must start to circulate the hot water into a bigger tank. For this i use one thermostat with a DS18B20 sensor. When the water in the bigger tank reaches 45C, it starts another pump, which circulates the water into the underfloor pipes. The second pump works with a second thermostat from the same nodemcu, with a second DS18B20 sensor. Everything works great, but i have a big fat concern, the power off button of the thermostat, if by accident someone turns off the thermostat, there is a risk that the water will reach very high temperatures. There are safety pressure release valves installed, but i would like to avoid that scenario.
Is there a way to have the thermostat always on?
My current code is this (there are two supplementary switches, ignore them):

esphome:
  name: controller-centrala-caldura

esp8266:
  board: nodemcuv2

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:
  password: "mypass"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

i2c:
  sda: GPIO4
  scl: GPIO5

display:
  - platform: lcd_pcf8574
    dimensions: 16x2
    address: 0x3F
    lambda: |-
        it.printf(0, 0, "C:%.1f [%s]", id(senzor_t_cazan).state, id(action_cazan).state ? "ON" : "OFF");
        it.printf(0, 1, "P:%.1f [%s]", id(senzor_t_puffer).state, id(action_puffer).state ? "ON" : "OFF");

dallas:
  - pin: GPIO4

sensor:
  - platform: dallas
    address: 0xcd3c01d607a71c28
    name: "Temperatura Cazan"
    id: senzor_t_cazan
    on_value_range:
        - above: 70
          then:
            - switch.turn_on: action_cazan
        - below: 50
          then:
            - switch.turn_off: action_cazan

  - platform: dallas
    address: 0x013c01d607f71f28
    name: "Temperatura Puffer"
    id: senzor_t_puffer
    on_value_range:
        - above: 60
          then:
            - switch.turn_on: action_puffer
        - below: 30
          then:
            - switch.turn_off: action_puffer

switch:
  - platform: gpio
    pin: GPIO12
    #D6
    inverted: true
    name: "Hidrofor"
    id: action_hidrofor
  - platform: gpio
    pin: GPIO13
    #D7
    inverted: true
    name: "Boiler"
    id: action_boiler

  - platform: gpio
    pin: GPIO14
    #D5
    inverted: true
    name: "Pompa Cazan"
    id: action_cazan
    internal: true

  - platform: gpio
    pin: GPIO2
    #D8
    inverted: true
    name: "Pompa Puffer"
    id: action_puffer
    internal: true

climate:
  - platform: thermostat
    name: "Termostat Cazan"
    sensor: senzor_t_cazan
    default_target_temperature_high: 57 °C
    min_cooling_off_time: 15s
    min_cooling_run_time: 15s
    min_idle_time: 15s
    default_mode: cool
    cool_action:
      - switch.turn_on: action_cazan
    idle_action:
      - switch.turn_off: action_cazan
    visual:
      min_temperature: 50
      max_temperature: 70
      temperature_step: 0.5
    preset:
      # Standard Preset
      - name: home
        default_target_temperature_high: 57
        mode: cool
      - name: away
        default_target_temperature_high: 57
        mode: cool

  - platform: thermostat
    name: "Termostat Puffer"
    sensor: senzor_t_puffer
    default_target_temperature_high: 45 °C
    min_cooling_off_time: 15s
    min_cooling_run_time: 15s
    min_idle_time: 15s
    default_mode: cool
    cool_action:
      - switch.turn_on: action_puffer
    idle_action:
      - switch.turn_off: action_puffer
    visual:
      min_temperature: 30
      max_temperature: 55
      temperature_step: 0.5
    preset:
      # Standard Preset
      - name: home
        default_target_temperature_high: 45
        mode: cool
      - name: away
        default_target_temperature_high: 55
        mode: cool

Thank you very much!

2

Well just don’t turn them off and they should stay on but I think your saying if someone turns them off by antecedent, power outage (use UPS or battery). Cant control that just have to plan for it. See below

Normal what you do for fail safe is you have a high limit thermostat that if the temp gets to a high set point it turns off the gas… now you said “wood burner” can’t just turn that off. :fire:

So what you could do is.
1/ Notify yourself (phone) when or if the thermostat/s become unavailable (turned off).
2/ Have a siren and or flashing light that is hard wired to high limit temp sensor… no automation (fail safe) or live a little and do a HA automation (you do have pressure release valves). This will alert someone in the area.
3/ Notify yourself (phone) if pump/s don’t start and temp is to high. Could use pump current draw as a trigger or a water pressure differential switch as a trigger. You could use the pump switch and temp but even if the pump shows ON it could be OFF (blown or isolated).

there is probably more but you get the idea.