[JRTJH]

Prior to removing the old anode, did the water heater work properly on electric? If so, what else did you do at the same time? Your first post indicates that you changed the anode, the heating element, both high temp/thermostat switches, all at the same time???? If so, are you sure that you got it reassembled in the same wiring configuration as the original??? AC connections on the heating element aren't important, but they can be on the high limit/thermostat switch, especially the DC (gas) side.

I would think that if it was working before you replaced parts, there shouldn't be an issue with the physical ability to heat water now. So I'd suspect that the burner tube, if it was working previously, isn't the issue now.

Possibly there's a link to some other action or parts replacement that isn't "glaring at all of us"....