syrinek

40 is too high. Bring it down to 35 and then watch whether the HP can handle your home's confort and satisfy the stat at that outside temp. If it can, then you can adjust a little downward. If it can't, then you will have to go back up a little. With temps droping tonite in your area, this would be a good chance for the test.

Good LucK!

Thanks for the info. Testing tonight just to see if the backup gas will come on after the vendor worked on the unit today because the backup gas would not come on at all, but the heat pump shut out so it has been getting cool. Will definetely try your suggestion and measure by the confort level.

Programmed the Thermostat to stay on the Heat Pump up to a temperture of 35 degrees outside. Seemed to work good with sufficient warm air coming from vents.

I would go lower to 32 degrees and see how that works. At 30 degrees outside air temp, my new heat pump puts out 93 degree air (with supply air at 70 degrees). The balance point is typically 32 degrees outside air temp depending on heat pump capacity and condition as well as house conditions (insulation, etc).

Good luck.

Set at 30 degrees now which is the next setting. Will need to wait and see how it works. According to the weather advice, tempertures will not get down to the low 30's during the next 10 days, lowest is 37 degrees. Will let you know. Thanks