Are you measuring the 240V when the heating element is connected? or just open circuit? Have you tried hooking up the SSR with just 5V and Ground to see if the element heats? Don't PWM the SSR, just use an On/Off digital output.
Are you measuring the 240V when the heating element is connected? or just open circuit? Have you tried hooking up the SSR with just 5V and Ground to see if the element heats? Don't PWM the SSR, just use an On/Off digital output.