sswillow

Wanted to post an update in case anyone ever has my issue in the future. First, Marc was right, get another HVAC person. I actually had a couple more come out just to be sure. Turned out it was the pump all along. The first company damaged the first replacement pump during installation. Because the space is so small, the torch ended up burning the plastic inside the pump. We learned that when replacing the pump there is no need to cut the pump out. Cutting the pump out just makes a ton of more work including having to weld/solder new connections. All you have to do is remove 4 hex bolts on the pump's case and just swap out the old pump guts for the new ones. It really is that easy. Would have been a 15 minute job as opposed to the countless hours that were spent.

Thanks Mike. The HVAC company came back out today. There is no release valve up in the attic. Being in a townhouse makes it more difficult. The last thing to do is to remove the coil and clean or replace. They said that's 8 hours of work since my blower and pump (that they just put in) will have to be removed. Also, if the coil has to be replaced, it's highly likely it will need to be custom made. They have another customer with the same symptoms and are going to service the coil on his system to see the results instead of continuing to rack up the hours with me and getting no results. I'll update once I learn more.

I have an Apollo HydroHeat system that is not blowing warm air. I had the Apollo water heater replaced 6 months ago with an AO Smith. It was connected up exactly the same as the Apollo. The HVAC company has spent many many hours trying to determine why there is no heat. They have replaced the pump, the system has been flushed, connections have been checked. We are wondering if there is something specific with the AO Smith water heater, a valve or connection we are missing? You can feel the hot water in the pipe leaving the water heater, but half way to the wall, the pipe gets cool. We can get the coil to feel warm only if we have the release valve open and the water is running freely to the street. I'm a layman, so my terminology may be off. Trying to figure out what we are overlooking.