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my son has a Lennox 14HPX-036 heat pump, with no auxilliary electric or other heat, at a vacation house that he is having trouble getting heat out of. I believe this unit is 36,000 btu/hr rating and has a 36,000 btu/hr air handler attached. Having trouble getting any heat out of it at all, in 40 degree outdoor air temps, cannot keep 1,300 s.f. house above 53 degrees inside with outside temps in the 40's.
The one HVAC company who looked at it is having trouble diagnosing the problem. Last week they said the equalizer tube in the outdoor unit had broken and they replaced it and added 9 lbs of refrigerant. Within the same day, the unit could not deliver warm air and in the one visit since they have not gotten back to us with the problem or a repair solution.
Anyone have any thoughts/suggestions?
And, we'd be interested to know if an auxilliary natural gas furnace could be added to the air handler for heat at low outside temps. Lennox says their Merit funaces work with this unit and run the heat pump at higher outdoor temps and the furnace when the outdoor temps are lower to minimize cost. Anyone have any experience with these units?
Location is in Long Beach Island, NJ (basically southern NJ). Thanks in advance.