No Prob. Yeah, the most important time for a fan clutch to work, is when it's hot.
Do this at least. BEFORE you start it, spin it, and see how much resistance there is. THEN get it hot, don't OVER heat it, but get it pretty hot, like right before overheating. STOP THE ENGINE.. (lol) and then see how much resistance there is. If it is not quite a bit more resistance, then your fan clutch is probably bad or getting weak. See if there is any silicone fluid leakage, most are filled with silicone fluid, and have a bi-metal device that locks it up when it get very hot. Some are different in operation, but all should pull more air when they "sense" hot air flow from the radiator.. not normal operating temp, but HOT.