Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Failing Aquastat?

T_RO
Member Posts: 1
in Oil Heating
I have a 20 year old weil-mclean 68V with tankless coil, 4 zones, circulators, Tjernlund PV, Honeywell L8124A,C aquastat.
A couple times this past week my boiler temp was 120 degrees or less before it fired. My settings are 160, 180, 10 diff. Is my lo switch failing? Is there a way to test it? The only thing I've done is run them around a little. This aquastat is ~5 years old.
Edit: add'l info this morning at 400 am house pretty cold when wife got up. no hot water in shower, when I got downstairs boiler was running and at about 130 by then. temps were in low 20's wouldn't have a call for heat started the burner?
Also, I have been thinking about installing an electric hot water heater, if I do so I assume I could go with a different type aquastat that only has a Hi setpoint?
Thanks
A couple times this past week my boiler temp was 120 degrees or less before it fired. My settings are 160, 180, 10 diff. Is my lo switch failing? Is there a way to test it? The only thing I've done is run them around a little. This aquastat is ~5 years old.
Edit: add'l info this morning at 400 am house pretty cold when wife got up. no hot water in shower, when I got downstairs boiler was running and at about 130 by then. temps were in low 20's wouldn't have a call for heat started the burner?
Also, I have been thinking about installing an electric hot water heater, if I do so I assume I could go with a different type aquastat that only has a Hi setpoint?
Thanks
0
Comments
-
power vent
How is it wired? Sounds like they are using B-1, and the fan prover is not always, or delaying the power supply to the primary control.0
This discussion has been closed.
Categories
- 81.2K THE MAIN WALL
- 2.5K A-C, Heat Pumps & Refrigeration
- 37 Biomass
- 394 Carbon Monoxide Awareness
- 2.7K Controls
- 1.4K Domestic Hot Water
- 3.8K Gas Heating
- 101 Geothermal
- 133 Indoor-Air Quality
- 2.4K Oil Heating
- 32 Pipe Deterioration
- 581 Plumbing
- 4.3K Radiant Heating
- 334 Solar
- 12.3K Strictly Steam
- 38 Water Quality
- 11 Industry Classes
- 54 Job Opportunities
- 8 Recall Announcements