She was a dark and cold (10F) nite :)
Woke up to colder than usual basement. Sat morning. Quick troubleshooting s
howed functioning Tstat, good wiring to boiler's control box. Swapped relay
s (I have 2 zone system), for JIC, nada.
Pump showed 110V on terminals. Swapped the start cap from the working pump.
Nada, no noise of running water, dead quiet boiler.
Started calling local plumbers. Vague quotes of $300-400 for new pump (!),
100s more for labor. And I'd have to wait till Mon - meaning I'd need to so
mehow keep the basement warm, while pipes in the walls, exposed to cold, wo
uld prolly freeze over.
Being a handy type, looked up replacement part on Amazon. Being prudent, or
dered 2. If 1 failed, second one is not far behind. Under $100 per, Grundf
os. Ordered for Sun delivery. Kudos to Great River, they showed up nice and
Replacing was real easy. Power off. Shut off valve above and below the pump
to OFF. 4 flange bolts. Put a roasting pan under the old pump as I remove
d it, may be 2 cups of water came out. Open the valves back.
Note that some pumps come with a check valve that needs to be removed prior
to install. My didn't have it. Do RTFM
New pump has spring terminals (yay!).
Started up the furnace. Some very faint noise came out of the new pump. Hmm
. This: http://www.harborfreight.com/digital-clamp-meter-96308.html
2.5A draw. Way too much for 1/25 HP pump. The pipe up/down stream of the ne
w pump stayed luke-warm. Clearly there was a blockage in the line.
After few minutes pump got hot to touch, so I turned the system off.
Clearly I had dreaded ice aka frozen lines.
Got the basement as hot as possible. Used hair dryer to heat up whatever se
ctions of the heating pipes I could get to. kept cycling boiler every 20 mi
n or so.
Well, it took over 2hrs of that and just before I was ready to throw in the
towel, success. She sounded like Niagara when water finally started to flo
w. Current draw went down to .7A. That's more like it !
That and the pipes up and down stream of the pump finally got hot.
So the moral of the story:
- anyone can handle the replacement job
- for JIC, if your pumps are more than 4 years old, pre-emptively order a r
eplacement and have it handy. They WILL quit, eventually. Helps to be prepa
- Amazon has EVERYTHING and I mean EVERYTHING. Before you let a local trade
r@pe you, see if you can buy what u need there. For lots of areas they do
1 day delivery, even on Sundays
- even if u have an alert system that would go off when temp drops, what wi
ll you do when a pump quits on you @ 1am on sub-zero Sat morning ? Unless y
ou have a replacement pump, there is 95% chance of pipes freezing before ne
w pump could get installed, EVEN if you manage to keep the area warm. So, d
o order a spare