I have a DIY power controller I purchased online that I assembled and has been running fine except for 1 issue. Whenever I turn the pot down passed 40% it stops sending power to the element. Which has not been an issue until today when I tried running a pot spirit run and was unable to fine tune my power input any lower than 40%. I was running it on an 1800W element.
Its a 40A SSR with a 500k pot attached to it. In built 240v fan that works once power is to the box as well as a 240v light to let me know the box is powered. Works fine except for that one little issue.
I'm wondering if anyone has any idea whats going on here?
I've attached pics to help see how it's wired.
Will have access to a multi-meter later this evening.
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![Image](https://i.imgur.com/CxsQjMYl.jpg)