Morning all! I have a question. Installed a PH13-2 1/2 ton heat pump back in AUG. 2008. All readings were good in the summer - good SH - SC - SAT - RAT. Now around the end of NOV. 08, customer calls and says the unit is not putting out heat. We live in the Williamsport, PA area, drove over to take a look at HP - OAT was 38 deg F - RH was 42% - SAT was 90 deg. F - RAT was 65 deg F. Home space temp is 67 deg F - True - suction pressure was 44 psi - HG discharge was 185 psi - HG line temp was 117 deg F - liquid line coming back from the evap was 77 deg F. Customer keeps bumping up stat (Honeywell TH8320) 67 deg F to 68 deg F to 69 deg F and then unit will run for ling periods of time. I asked the customer to set the stat at 67 - 68 deg F and let it go. Oh, this is a duel fuel oil - forced hot air system - I did find there were some supply vents the customer shut down off of main trunk which wasn't good - made those repairs - I have the CFM across the coil I need for the 2 1/2 ton unit. Oil burner is a UNI-CELL - mod# OBUA67-036 and did have A/C only - a 2 ton unit. When I went to size the new unit a took many things into consideration and even used a thermal imager to check for infiltration, which I did find some - this is why I went up to a 2 1/2 ton unit. According to all my readings (I have been to the customers home 3 Saturdays now - 8 hours (I stand behind my installs) - just going back over everything I done in the summer) and readings are where they should be. I explained to the customer long before the installation that this isn't his "oil heat" and not to expect those temperatures out of the supply vents. I even went as far as to ask him "are you sure" - and he concurred, "yes" so I went ahead with the installation (I have done several of these over the years - including my own with no issues). The location of the T-STAT was on the edge of a wall separating living room dining room and across from a supply vent - 10' to 12' away. I can see why the guy who done the original installation may have placed it there because I moved the new T-STAT to over the return and the indoor temp on the stat would drop down 1 to 2 deg while the system was running and never come up. I moved the stat back to original location - asked the customer to set stat to 67 or 68 deg F and unit would run and cycle but then the customer would move it to 69 deg F and the system would run and run. I feel the customer needs to set the T-STAT and let it alone - but that is not the case.
Any comments would sure be appreciated. If you need more info I can supply it. THANKS ALL!!!!!!!!!