Coleman-Mach 08-0033 Cool Only Control Package for Non-Ducted Ceiling Configurations with Wall Thermostat 8330-752

I have bought this item 3 different times one was sent to me with bad relays in it they did send me a refund on it but i just got one not even a month has gone by it only worked for that long and the relay went out again why is the relays going out and not any of the fuses? I have to buy the whole controle box because the compressor relay keeps going out and not blowing any of the fuses. now i need another one because the relay went out in it again. Dont understand why this keeps happening with it. not worth the cost or headache for lasting only a month. cant just change the relay have to buy the whole thing.