A freind of mine had air conditioning system in house changed to a new Rheem. The Rheem air handler appears to be VF and is 120 volt single phase. Voltage to neutral at supply to main double pole breaker for house reads 124 V on both legs. When new blower turns on, voltage on blower supply drops to 114 volts and voltage on other leg to neutral increases to 134 volts. How is this possible? Looks like a poor neutral connection would affect both legs in the same manner.