Cicero

That looks relatively normal to be honest, from what I remember. Lastly, just as a side note, are you using the proper fluid and not a different manufacturer fluid? I guess if the fluid was thinner or from a different manufacturer that may increase the level of that click as its not as viscous.

The tube heating and haze output operates cyclically, so the pulsed pump operation every few seconds is correct. The tube heats up, then on the cooling phase fluid is pumped. The ticking of the pump is a higher/louder pitch when its trying to pump air, and then lowers significantly once fluid is through and its fully primed. The MVS hazer doesn't operate like regular smoke machines because the fluid isn't heavily watered down, so to prime the pump using regular operating settings can take an age, you can manually prime by putting into DMX mode (without DMX plugged in), then holding Select and Haze, this'll tick the pump continuously but also piss fluid out the tube and make a mess.

I'll add, unfortunately the fans were custom made for the MVS range, so you'll struggle to find an off-the-shelf replacement. Sadly a long-standing company decimated by this pandemic.

There are two fans, so first try to swap the spade connectors around (motor one connectors to motor two) and see if the fan spins or not. If it spins, you can look at swapping the switching components (triac or opto), if it still doesn't spin, then it needs a fan motor replacement.