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Results tagged with hvac
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user 18763
(Heating, Ventilating, and Air Conditioning) For questions about installing, repairing, and troubleshooting HVAC systems.
0
votes
Why does my electric furnace sometimes blow cold air?
You should have it serviced by a qualified HVAC technician.
Good luck! …
- 20.6k
2
votes
Capacitor values and compatible replacements
Are you sure that is "pf" and not microfarads?
The symbol for micro is a Greek letter mu with a descending tail in the "μ". It could be confused for a "p" fairly easily if the printing is faint. A pi …
- 20.6k
2
votes
Are there window fans that seal up when not in use?
Window fans don't normally have this feature, but I have a whole-house fan that has weighted louvres that close when not in use. Most exterior wall fans operate the same way with the louvers closing b …
- 20.6k
3
votes
Electrical Disconnects for condensing unit
The following is from the 1999 NEC (my 1990 NEC hard copy has the same wording in the same location) so it has been there a long long time:
440-14. Location. Disconnecting means shall be located w …
- 20.6k
0
votes
Duct sizing impact on flow
Will I see a noticeable difference in airflow one way or the other?
The fan creates the flow according to the amount of resistance in the ductwork and the fan's CFM rating. If your setups are app …
- 20.6k
1
vote
Zoned heating system very warm even without heat on upstairs?
If the upstairs is truly another zone there should be a separate damper to close it off or reduce the flow.
Zoned means you have separate control over different areas.
Sounds like you either need to …
- 20.6k
2
votes
Accepted
Where to start looking for problems with my fujitsu split system inverter?
I would call another HVAC company for a second opinion.
Look for a certified Fujitsu HVAC technician.
Good luck! …
- 20.6k
0
votes
Why doesn't my furnace fan run in cool mode?
Troubleshooting the controls and electronics of an HVAC unit is a very advanced project even for an experienced DIYer. Not a project for novices.
Good luck! …
- 20.6k
1
vote
Air Handler with no condensation
Yes, the second level unit is most likely gravity drained and the first level unit needs the ejector pump.
The ejector pump is used to pump condensate water to a higher level. It only operates for a …
- 20.6k
2
votes
Do I have emergency heat? Why is my compressor making crazy noises?
When it gets extremely cold outside air to air heat pumps don't work very well.
That is why they are usually set up with auxiliary resistive heating coils. Referring to it as "emergency" heat is a li …
- 20.6k
0
votes
extra thermostat, electric dampers and 1 furnace
Try this site for the dampers:
http://www.famcomfg.com/hvac-damper.html
They make a 24V version but I would power them from a separate transformer than the furnace power. …
- 20.6k
1
vote
Confirming correct wiring on replacement AC contactor
I would replace the old one and connect the wires to the new one in exactly the same pattern.
Make sure your wire from the capacitor has the same continuity to the left side terminal you described in …
- 20.6k
2
votes
What is the recommended Temperature setting for dual zone homes when not at home?
Imagine you have a tire with a small hole in it (the heat loss of your house) and you are trying to keep it pumped up (your HVAC). …
- 20.6k
2
votes
15A breaker tripping when Air Conditioning comes on
Call a reputable HVAC or electrical contractor to take a look at it.
Good luck! …
- 20.6k
3
votes
Accepted
1995 Rheem tripping 40A breaker
If it continues to trip then you need to call the HVAC contractor back out for a more thorough examination.
Good luck! …
- 20.6k