I have a Whirlpool gx5shdxvb01 that I've been trying to fix the icemaker in.

I first replaced the actual icemaker but that did not work.

I then replaced the fill control valve. I know it was bad because it was 1.5 ohms across the contacts and it would not open when I put 110 volts to it. New unit measured 150 ohms I believe. This did not help, didn't really expect it to, but was hopeful.

I then started looking into a deeper diagnostic of the ice maker and started probing voltages. I was getting 0 at contacts L and N so I pulled out the harness and it appeared that the thermal fuse was blown. I bypassed the fuse because I am tired of throwing parts at this thing and I now get 5V at terminals L an N. When I short T and H to force a cycle, the voltage on L and N drops to almost 0 but nothing else happens.

I'm at a loss here. I don't want to drop $200+ on a control board for this thing unless absolutely necessary. Any advice or additional tests I might be able to run to figure out what is going on?

Also, some history that may help turn on a light bulb. This fridge became a garage fridge about 4 years ago. I'm sure it spent much of that time with the icemaker arm down and set to make ice. Not sure if that really would matter much. It has also been moved from house to house twice. Everything else works great aside from the lack of ice.

Well that was a pretty silly thing to overlook I suppose. Nowhere did I see that you had to close that switch, but it makes sense that it wouldn't just be for the light in there.

I did my tests again this morning with the switch closed and all looks well. It ran a cycle, filled with water and I'm sure it would have kicked the ice out after it was frozen. I didn't want to leave it in there because I have the blown thermal fuse bypassed. Now to wait on the harness to arrive so I can finally finish this up.

Thanks for the reply, it was super helpful.