I have 2 waterfurnace split system heat pumps. I just recently purchased the house and noticed the stage 2 heat pumps were only hooked up for stage 1. I have now hooked them up for stage 2 however I now get temperature rises of 37F on the ES048 with quite a few bubbles in the site glass (there are bubbles in stage 1 as well (air temp rise of 23)). The other heat pump's ES036 air temp rise is 24F stage 1 and 49Fon stage 2. Not really any bubbles once a good run time is achieved. Any suggestions? Are these temp rises too high? Unfortunately, the heating demand for the house requires more than stage 1, so if I only leave stage 1 hooked up, backup AUX electric is used quite often.