Trace the blue and yellow,are they connected to anything else before reaching the relay?

Cisco there are three equally important components-quality HVAC, the install by dealer, and probably the most overlooked and disregarded is the ductwork system. these are my minimum specs for a new HP system. both outside and inside units should be replaced to have a properly matched system. 15 SEER, 12.5+ EER, 9 HSPF best matching VS air handler full BTUs in both cooling and heating for your rated size R-410a refrigerant(same as Puron) scroll compressor preferred electronic demand defrost preferred thermostat with "dehumidify on demand" feature staged backup heat strips new and correctly sized refrigerant lineset you want a thorough inspection of your ductwork system. size, overall condition, supply and return lines, insulation qualities, leak test, etc. any hot/cold spot issues in your home should be addressed. I would only use authorized dealers for the various brands that provide quotes. see mfg websites. I would look at Trane/AmStd,Rheem/Rudd,Carrier/Bryant. Depending on your location, I would not purchase a new HP system that did not have electronic demand defrost. IMO

Thanks for the help! The 2 ton a/c system that is in place performed fine (actually better than fine since it lasted 19 years) with good air flow to the upstairs. This may be due to the fact that the basement a/c system also reaches the upper floor (the original design of the house had just one system but it was inadequate for the upper floor). So, the upper floor system that is placed in the attic is sort of a supplemental system. Three of the bedrooms are cold in the winter so I've opted for a heat pump system this time. The upper floor is 1755 sq. feet with 4 bedrooms and 3 baths. The existing attic system has one large return vent in the hallway between the master BR and the other 3 bedrooms. I plan to stay in the house indefinitely so I'd rather spend the money up front for the highest efficiency system so as to deprive Pepco, our local power company, of as much money as possible. While budget is certainly not unlimited, I want the most efficient system, properly sized and installed. For a long term purchase like this, I do not mind spending more to get the best.

Good advice from Ryan. I did something similar to what DaWard is thinking about doing. I found a local contractor that sells Goodman to the public (York, PA). I specked out the 14 SEER heat pump system myself and picked it up at his warehouse. My wife works for a Property Management company so I used them for the install and paid labor only. Labor had a 1 year warranty and the 10 year parts warranty is covered by Goodman because it is a non-internet sale. Paid $2500 for all equipment (R-22 condenser w/Copeland scroll, 3 speed a/h, TXV, heat strips, by-pass humifier, condenser mounting pad) and $1200 for the install = $3700. Almost $2k less than a Trane 14i. 1 year later and so far outstanding. Reduced my kw consumption by 40% compared to my 21 year-old 7 SEER Trane. Puts out great (and cheap) heat in the winter and I can freeze meat in the family room when its 95F outside. I will say that I have a few minor issues with my Goodman: - Sheet metal on hair handler is very flimsy. - Filter rack in air handler is poorly designed so changing the air filter is a surgical procedure. I think that the Goodman is a good basic system, with some flimsy sheet metal, but very few systems fail from flimsey sheet metal. If the compressor and coils hold up, the system should last at least 10 years. I'll find out. Take care.