RV to power home temp

I have a few times. I just made a power cord with two male ends. FIRST..extremely important... shut off your main incoming circuit breaker in your home's panel. Then plug your motorhome's cord into the closest outlet in your home. Now half of the homes outlets will be powered. If it isn't the outlets you need, try plugging it into a different outlet. You will be back-feeding electricity to one of the two buss bars in your panel. One other thing, flip off any 220 volt breakers that are in your panel.( water heater, elec stove , well pump, clothes dryer etc)