Last summer I had a problem with my 3.5 D not operating correctly. It wasn't heating but the display showed high temp then alarm would go off. I got involved in a couple of large projects and forgot about the problem until bone in pork shoulders went on sale for 99 cents a lb. at the local market. I came home,plugged the 3.5 in, flipped the switch and nothing happened. I read thru the forum to look for similar problems and found a lot involved broken or burnt wires. Before taking the back off I plugged a fan in the outlet to see if it was live. Then I took the back off taking pictures as I removed 3 layers of insulation checking the wires for burns or breaks. Everything looks OK and I used a multimeter on the element to check for continuity . One
wire on the solid state relay had a little black on it but when I traced it to the pid it went through a black plastic tube and attached to the board. i don't know if the black on the wire was a mark to designate it. I'll take any advice you have replace pid ,solid state relay, or whatever. I'll try to attach some pictures.
