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any geofurnace experts here?

I

IaLeo

Well-known Member
My geofurnace has done a great job this bitter winter. Lately it has kicked over to electric grid backup. When shutting down and later restarting it, it runs well, sometimes for days, sometimes for hours. Incoming water filter is clean, waterwell supply (a pump & dump system) seems adequate although my flow meter is unreadable due to iron stains.
One thing I notice is the water supply temp is only 48deg when it used to be around 54deg and the exit water goes significantly below 30deg when it used to hover at or above 30deg. Wonder if exit water line is freezing? I have never had the incoming water line to the house freeze (approximately 15years old). Could this years frost be deeper or the ground thaw be different. No other work done to the system for several years and it has been reliable heating or cooling.
If you have an idea what might be happening before I call my expert. IaLeo
 
My furnace was running on the back up system also. The second repairman brought his refrigeration tools with him and they determine that the freon was gone. They added freon and it has been running better than before. He will return to check if it is holding the pressure or if it is leaking. Do you have ports to check the pressures on the different sides of the systems? I do not and that is why they will re check it later.
SDE
 
My geo unit monitors the water in and out temperature, and if it gets in the area of freezing it shuts down the geo side and switches to resistance heating on the models that used pump and dump. On the models like mine with a closed loop using alcohol the low temp shut down is disabled.
 
You could have also frozen the ground around the exit pipe with the cold water, but it would still be due to the field too shallow.
 
You're short of refrigerant and your system pressures are low. It's running on the backup grid because the refrigeration cycle can't provide enough heat from evaporation and compression to heat your house. Have somebody check your system for leaks, and while they're at it, have them fix that flow meter.
 
I am also a UA fitter. UA fitter gave you good advise, but for more info I always suggest going to heatinghelp.com, Dan Holohans website and go to "the wall" and ask your heating questions. Experts from all over the USA will chime in to help. UA Fitter, where are you located? I am in central Michigan out of the Ann Arbor Local 190.
 
If you didn't have much snow cover, then frost can go deeper than normal. Central MN had a comparatively mild winter this year compared to a bitterly cold 2013-2014 winter, but low snow cover let the frost penetrate deeper this year. Towns and home owners had more troubles this year with water lines freezing eight feet down under streets. Your low supply temperature could be a symptom of colder ground.

I would call your expert just to be safe, he can tell you if others are having the same problems.
 
I'm out of Local 23, Rockford, Illinois. You and I are in the definite minority here, but maybe we can do our part to dispel the popular belief that all union members are lazy, ignorant slugs.
 
Anyone know what the savings are with geothermal, both pump & dump, and loop system, in percent?

Dusty
 
Hey Dusty, did you get your letter from the Internatioal saying you could go back to work for 600 hours and also keep you pension? Not sure where all the work is, around here things are still slow. I am a retired member of local 577.
 
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