12v irrigation solenoid getting really hot!

[Vendril]

Hi,

Using ESPHome and HomeAssistant.


Have hooked up a 12v irrigation solenoid (normally closed) to relay 8 but it is getting really hot even when it is off. 

I have it wired and coded like this:

12v jumper cable (from the board power) to the (COM) on relay 8
GND jumper cable (from the board power) to the solenoid
(NC) to the solenoid

Code:

  - platform: gpio
    name: "relay8_solenoid back wall spinkler"
    id: relay8
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 7   # relay 8
      mode: OUTPUT
      inverted: true

Thanks,

[admin]

1. what hot? irrigation solenoid hot? or A8S board's relay hot?
2. what's your irrigation solenoid working current?

[Vendril]

Hi KinCony

The valve is getting hot.

It is this one - https://www.hillsirrigation.com.au/shop/...oid-valve/
has a stamp of 7W on the top of the valve.

Have I wired it correctly?


Thanks

[admin]

you can test it, connect your power supply to valve directly, without A8S board. if also hot, check with valve datasheet, is the temperature within the normal operating range.

[Vendril]

It is normally closed solenoid. should it get hot when relay is off?

EDIT: Never mind. I had it wired wrong.

Thanks

[admin]

ok.