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Hello All ! Todays problem is All of the working tanks are not heating up even after 2 hours of warm up time. Working tank temperatures did not rise. All fuses on J390456 are ok (F1-F11 and FL1-FL4) all SSRs look good, None are dark or burnt or damaged. PCB J390564 is the same. Everything looks fine. No error messages were displayed. What could it be ? thank you !