I had a 4 ton Waterfurnace water-to-air package system installed 6 years ago. Until now, it's been great. No issues. I noticed this past weekend that my electric bill for December was way up, 50% more than normal. So I started looking more closely at run times for December as well as register temperatures. The runtime for December was over 50% more than it was the prior year. My loop temp, which usually by January is around 45 degrees, was still at about 51 degrees. My register temps were only in the mid 80s when they have easily been over 90. My installing dealer was Servicemark, which was a division of UGI, which is the same company that owns Amerigas. They did an absolutely stellar job installing everything, and were really great to deal with. When I was researching Geo systems it was clearly stated here that you need to have a good dealer, and Servicemark had a massive custom homes division at the time that was doing things like installing 6 units in one house. They knew their stuff, were supportive, nice, and I was confident I was in good hands. I say was, because late last year it turns out Horizon Services bought portions of Servicemark, and although the Servicemark name still exists and is being used, they are now Horizon Services. I called on Sunday to have somebody out to diagnose my system, and when Horizon finally came out on Tuesday the tech did two things: 1. Confirmed I have a problem - low refrigerant. He surmised there is a leak somewhere (of course) but his sniffing at the coil didn't find anything definitive. Oil residue in the pan at the back corner was the only thing he could find. 2. Immediately he told me, "Horizon doesn't do Geo, you'll have to call another dealer." Of course I wasn't happy with this at all. Like I told the tech, "if you don't service Geo, why are you in my house at all?" There was much more discussion than that, but at the end of it all it comes down to the fact I've been orphaned by Servicemark / Horizon. Not good news for me. So far I've called 3 dealers. 1 didn't call me back, the other one has been trying to schedule me for 3 days but keeps saying how "Service contract customers come first," implying I should be happy they are even working with me at all. The third I just called today to see if they can be any more responsive than the other ones, and they informed me that they will accept my Waterfurnace warranty allowance but I get to pay them $100 additional to do so. Great news all around. I've been very patient, it's the middle of January and the worst time of the year to have the need for repairs, so I've told all dealers involved that I understand the constraints they are working under. However, what this brings to light for me are two things: 1. The preaching on here about getting a good dealer is good, but honestly, you need to look beyond that and survey what would actually happen if you needed a Geo repair and your great dealer is suddenly not there any more. How hard is it to get service? Geo is not that common, and it's tough to find somebody who can do repairs, and even more so if it's the prime season. If I still had a gas furnace I'd have 10x as many people out there to call up to find somebody to troubleshoot. 2. Eroded savings of Geo when a repair is needed. Geo is sold on its operating efficiency and cost savings. However, I can already tell this repair, assuming a new coil will be needed (most likely) is going to cost me many hundreds of dollars. It is well known that Waterfurnace allowances for labor are terrible, and the fact that a dealer wants $100 just to deal with them over warranty costs tells me they're not great to deal with on that front. I can't wait to see the final bill when this is all resolved, I'm betting I'll be out $1000 for a repair on an in-warranty unit. That is not what the typical consumer expects when told they have a warranty. Time will tell, but that's what my gut is telling me. So there's my story of woe. The geo system really is great, but if I were shopping for a new furnace now, I would probably skip it and get another gas furnace. Buyer beware. One other thing, NEVER use Horizon Services unless you want to pay much more than you should. Two examples: 1. The tech who was out said my system was probably 1-2 pounds low right now and he felt the leak was there but was probably very small. I asked him if it would be a good idea to put 2 pounds of refrigerant in until I could get a new dealer in. He said Horizon charges $300 for refrigerant. 2. I have an Aprilaire filter. The 210 series filters are around $40. I get the generic for probably like $20 or so (it's been a while since I purchased them, I buy many at a time). Horizon wants $200 for this air filter. I guess this is how they pay for all that advertising. RIP Servicemark, you were great.