The fan motor went out on my AC compressor. Had the repairman come out and replace it. My old motor was a 1075 RPM. Since he did not have an exact replacement he used a universal replacement motor. Unbeknownst to me the universal motor was only 850 RPM. What if any problems will this cause me as far as reliability and performance issues? I have searched the web and have found lots of information about going from lower to higher RPM but nothing about higher to lower RPM. Thank you for any and all advice.