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  1. HVAC
    Hey all, I have an HVAC and I'm 3 years into use and it's probably time (over time) that I clean the drain line. There's an image attached. I'm wondering about best practice to clean this drain line? The opening ("1" in the photo) is where I'd expect to lightly blow and put cleaning...
  2. HVAC
    So I live in a college/University community and every year, regardless of viral disease and mayhem, the students throw away tons of furniture, appliances, and the infamous mii fridge. I've scooped a few over the years selling them on craigslist and the like. About 6 months ago I was coming home...
  3. HVAC
    A few days back, I found out that the fan of the HVAC system is running (fan inside is running and heating works fine) but the outside condenser unit is not running. The circuit breaker was tripped and whenever I switch on the circuit breaker, it trips again in 3-5 seconds. I changed the circuit...
  4. HVAC
    Recently I've been having issues with my AC. First it was a leak in the line set and then it was the time delay module, back to back in two days. Now I noticed that my zone two seems to be working only if I turn off the thermostat on floor 1. I am wondering if its the damper or damper motor or...
  5. Plumbing
    I'm running an HVAC closed loop system powered with a tankless waterheater. Grundfos SKU: 52722512 pump I cant seem to get more than 1.2-1.5 g/m on the flow not sure what else to check. From the start I havent gotten more than 2.0 g/m which is strange for a pump rated up to 30 g/m
  6. HVAC
    Hello, My house has a basic Hunter 42999b thermostat. The house was built in 1938, so I'm sure there were many shortcuts to sell. The rubbery external up/down thermostat buttons stopped working a WHILE ago, but the "switch" click options within worked (heat/cool & auto/fan). But now I can't...
  7. HVAC
    My AC has always worked fine. A couple months ago I replaced a battery powered thermostat with a Honeywell Wifi smart thermostat. The new thermostat needed a "C" wire for power and there was an unused dark blue wire behind the old thermostat so i connected it to the "C" port at the furnace...
  8. HVAC
    I currently have condensate entering my HVAC secondary drain line even though my primary drain line is not clogged. The HVAC unit itself is balanced, so condensate is flowing to the primary drain port, but the water is leaking from the unit into the secondary catch pan prior to entering the...
  9. HVAC
    Hello! I'm here to help with questions about flex ducts. If you have any questions, I'll gladly help. Cheers! Vero :)
  10. HVAC
    I have two 10/2 NM cables I need to bring in through the hole in the house into the 4x4x4 PVC junction box pictured. One cable will be connected to the connect my 10-2 NM cable to the THWN stranded cable going to my outdoor condenser for a mini split system; the other will be capped and sit...
  11. Insulation
    Hello, this is my first post and I have very little DIY experience. I have mold growing near my ceiling AC supply vents on the insulation and surrounding wall. I removed all the insulation around the vent and used a borax solution to remove the mold off the ceiling. My question is do I even...
  12. HVAC
    I have a Daewoo mini split …. Model number DSC-F1201 JLH-V I believe also called DSC-1285FLH... Purchased June 27, 2019 Unit stopped working properly a few weeks ago. Called a repairman last week. Repairman have been here twice, checked coolant and tried to troubleshoot but problem...
  13. HVAC
    Hello -- I'm a landlord and have this furnace (1988) in a rental home: SnyderGeneral furnace GUA080A016AIN (might be 12AIN, as someone has crossed off the 16 and written 12 in ink). It has stainless steel horizontal venting out basement wall. Inspector says all venting should be galvanized...
  14. HVAC
    Just had a great HVAC tech come to my place to look at the ductwork because the AC is unbearably loud. Thanks to some great folks on here, I found out that when we upgraded from 3.5ton to 5ton Trane AC, we needed to adjust the ducts to allow for more incoming air and outgoing air. This new...
  15. HVAC
    A couple of years ago, my AC went out and we hired a local guy to install a new unit for us. We had a 1600 sq. ft. loft with skylights and an open floorplan. We were using a 3.5 Ton unit, but he suggested that we upgrade to the 5 Ton unit. Which we did. It has been really loud ever since and...
  16. HVAC
    I am remodeling a 1972 built house. Second floor bedrooms have a vent on top of wall and a slit in wall at floor level. I don’t know what it’s for? The baseboard would cover up the slit. Only the master bedroom vent goes below the decking. Can some please explain theory? See picture.
  17. HVAC
    I have an A/C unit that is currently wired to my nest thermostat using 4 wires. No Common wire. there is an unused wire in the bundle of wires. Can I simply connect it to C on the A/C unit and then to C on the thermostat to add a common wire?
  18. HVAC
    I am confused about code and best practices for returning cold air from the basement. I have an unfinished laundry/furnace/water heater room (large) and a finished game room (also large). The laundry room is cold. The furnace and water heater are vented through the chimney. Dryer is vented...
  19. HVAC
    Is anyone aware of a spreadsheet or online calculator to be able to compare a heat pump setup vs a conventional gas furnace + AC condenser setup? Ideally, with inputs for local utility rates, average annual hours of usage with average annual temperatures, and ratings for the heat pump and...
  20. HVAC
    I am trying to balance by duct work and wanted to use static pressure to adjust the flows. If there are any better idea please let me know. I found big leaks and sealed them, its already doing better but wanted to see if there is a better way to make sure that flow does not go to unwanted places...
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