I have a Dometic RM2193 unit in my trailer that is not working on 120v, or 12v. With the elements disconnected, I get a "O" resistance reading, so no heating. I ordered new elements for it, the old units were 110W, but the new ones are 210w, same size and diameter. Will it harm the reefer to run the higher wattage elements. I know that the 12v will suck down the battery faster. Trying to get this thing fixed, without buying as new unit. P>S> I had to take the switches apart and clean out about a 1/2oz of dust out of them, now checked working.