It's not uncommon for such things to use spade terminals and it will be obvious if these are loose, they will just flop about when tweaked rather than feel firm. If there are screw terminals, check that these are tight. Look for discoloured connections or wiring. As it is cutting out completely then it could be a broken wire in a loom that flexes as the movable parts are shifted. Flex wiring to see if there are unnatural kinks or easier than expected movement.
These checks should be done with power isolated as a broken wire may poke through insulation to give a shock hazard. Most faults should be traceable without wiggle testing on live equipment.
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.