I posted on here a couple weeks back about whether to repair or replace an 18 year old waterfurnace unit. We ended up deciding to replace as the cost of repairs was escalating... Now we are the proud (and significantly poorer!) owners of a new WaterFurnace 5-series. We actually have two separate furnace units, both waterfurnace. They share a ground loop and a single flow control unit. The smaller unit is slaved off the larger unit (I don't actually know what that means, but this is what I'm told). We replaced only the larger unit as the smaller unit was functioning perfectly.
The installation did not go well. The new unit faulted out overnight and switched over to emergency backup. I called the company, they sent someone (the same tech who did the install) to fix. Turns out it was the compression monitor "watchdog" that was shutting down the unit. Tech claimed he had missed a step in the installation and that all was good now, he fixed the problem. He wasn't gone 20 minutes when the unit faulted again, same error. The tech who did the install said he was in over his head now, and the only person who could fix the problem was not available until the next day. Eventually (this took 2 more trips from the second tech over a couple days ) they end up replacing the contact switch and another part, I forget the name, but it's the capacitor that helps the compressor start up. Now things are working well. The tech leaves at 4pm. A few hours later, the second smaller furnace stops working (there was no fault indicator, just failing to heat the upstairs). Tech #2 returns the following day. The blower in the smaller unit won't start. Oh, and maybe our compressor has been damaged since there is no safety mechanism in the older furnace to prevent the compressor from running (and overheating) if the blower isn't functioning
He was able to get the compressor to start up by adding a hard-start component, but explained that the compressor was probably on it's way to failure. I asked IN GENERAL, what ballpark price to replace the smaller unit. I'm thinking, since a) the larger unit is a 6-ton and the smaller unit is only 2-ton and b) they've already replaced the shared flow-control unit it should be substantially cheaper than the first replacement. Apparently this is not the case???
So, long post, here, finally is my question. 1) Should a 2-ton replacement (with no flow-control replacement needed) cost nearly the same as a 6-ton unit with a new flow control (the price they mentioned is about 80% of what we paid for the larger unit) and b) is it possible that the 2nd furnace was damaged in some way by the incorrect (or even by the correct) installation of the larger unit - ie, something different about the flow control, etc.? I just find the timing of this really unfortunate and a little too coincidental to be unrelated.
One final question - for all you professional installers out there, is my waterfurnace warranty tied to the dealer who does the install? In other words, if I do determine these guys are somehow at fault and decide to stop using them, can I have another dealer service my furnace under the original warranty?
Thanks for any feedback!