|Posted by Greg Peters on November 10, 1999 at 19:16:13:|
|In response to Re: No Heat on Second Floor|
: This is our first winter in a new house and I can't figure out why there is no heat on the second floor. I drained and re-filled the system and had to re-light the pilot because the furnace wasn't firing correctly. The system is a gas furnace with base-board hot water radiators. There appears to be two zones on the pipes in the basement (i.e. two sets of pipes with valves that can be open and shut) but there is only one thermostat. I've tried to put more water in the system, but the valve on the furnace blows out the old dirty water when I add too much. My next step is to add oil to the pump, it doesn't look too bad but I'm sure the previous owner didn't maintain it very well. Any ideas? Thanks.
There are several things that could be causing this. Here's what you need to check:
Along with figuring out what controls the valves, you need to figure out what the valves do. If the second one is for DHW, it will have a pipe going to the hot water tank. If not, follow the pipes to see where they go. Maybe one goes to the first floor and the other goes to the second floor. Maybe they go somewhere else. Also look to see if there might be a third heating zone that's not controlled by a valve. Sometimes they'll do that to heat the basement. It makes no difference here (unless it goes upstairs) but it's something good to know.
Once you know what the valves are supposed to do, and what makes them operate, you should have the problem well in hand. If the second valve controls the second floor heat, and it doesn't ever operate, you might need a thermostat upstairs. If the valves are opening OK, and the pipe that goes to the second floor is connected to one of them, then you need to know why no water is going there -- probably air in the line and you need to bleed it. There are valves at the radiators for this purpose.
You might also check for shutoff valves in the lines. Sometimes these are put in so one component can be changed without draining the whole system. If one of those is closed you won't get heat in that zone. Also, don't overlook the possibility that your seller deliberately shut something off because of a leak.
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