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Started By
Message
Home AC help
Posted on 8/5/14 at 7:28 pm
Posted on 8/5/14 at 7:28 pm
Got home today to find that my ac would not come on. I checked all of the fuses. Checked the thermostat. Realized that my compressor outside is running, but my fan in the attic isn't coming on to pump the cold air in. Can anyone help please?
6
Posted on 8/5/14 at 7:34 pm to bosoxjo13
Is it blowing hot air?
Posted on 8/5/14 at 7:35 pm to ellunchboxo
It's not blowing in the house at all
Posted on 8/5/14 at 7:40 pm to bosoxjo13
I'd move this to the OT for more responses.
Posted on 8/5/14 at 8:10 pm to bosoxjo13
You sure the fan isn't coming on at all, or are you assuming it isn't because you can't feel it coming from the vents? If your evap coil is freezing, you'll feel little or nothing from the vents, but your compressor is still working its arse off.
Posted on 8/5/14 at 8:24 pm to ellunchboxo
quote:
I'd move this to the OT for more responses.
And jackass responses
Posted on 8/5/14 at 9:02 pm to Mr Gardoki
This happened to me. AC runs but no fan turning. I had to get a new fan motor (I think it was). Guy told me that the bearings locked up on the old one
Posted on 8/5/14 at 10:57 pm to bosoxjo13
quote:
I checked all of the fuses.
How old is your house? Could be the thermostat, it is responsible for telling the fan to come on when the compressor is on. Also could be the fan itself, or the breaker controlling the inside unit. Go to thermostat and turn the heat/cool control to "off", then change the fan control from "auto" to "on". If it doesn't come on, something is probably wrong with the fan. Call an HVAC contractor, you won't be able to fix this yoursefl.
Posted on 8/5/14 at 11:03 pm to ForeLSU
Had this happen to me last year. Fan outside would make a buzzing noise and not turn. AC guy said to immediately turn it off because it might save my compressor. Thankfully, I got to it early enough. Only had to replace the fan motor.
This post was edited on 8/5/14 at 11:05 pm
Posted on 8/6/14 at 7:11 am to bosoxjo13
note: I am not an HVAC tech...
Is the fan on the outside unit running? if not, could be a bad fan motor or could be a bad capacitor on the outside unit. If the outside fan is running but the inside fan is not running, could be a bad fan motor or bad capacitor on the inside unit. Can you get to the inside unit fan? If so, can you see if it will spin freely? If, when it's on, you can "kick start" the fan and it stays on and blows air just fine, then it is most likely the capacitor. You could also put use a multimeter that can check capacitance and check the cap itself. One thing to note is that if it's been trying to run for a while without the inside fan blowing, then it's likely that the line and/or coils are frozen and it will not function correctly until they thaw out.
If it's not any of that, it could be a bad control board on the unit in the attic.
I have had both of these scenarios happen to me on 2 different houses. First time was a bad capacitor on the outside unit and I was able to fix it for cheap. Second time was a bad motor on the fan on the inside unit. Unfortunately, I wasn't able to remove the old one and wasn't comfortable buying a replacement (couldn't easily find one online) so I (over)paid a company to do it.
Is the fan on the outside unit running? if not, could be a bad fan motor or could be a bad capacitor on the outside unit. If the outside fan is running but the inside fan is not running, could be a bad fan motor or bad capacitor on the inside unit. Can you get to the inside unit fan? If so, can you see if it will spin freely? If, when it's on, you can "kick start" the fan and it stays on and blows air just fine, then it is most likely the capacitor. You could also put use a multimeter that can check capacitance and check the cap itself. One thing to note is that if it's been trying to run for a while without the inside fan blowing, then it's likely that the line and/or coils are frozen and it will not function correctly until they thaw out.
If it's not any of that, it could be a bad control board on the unit in the attic.
I have had both of these scenarios happen to me on 2 different houses. First time was a bad capacitor on the outside unit and I was able to fix it for cheap. Second time was a bad motor on the fan on the inside unit. Unfortunately, I wasn't able to remove the old one and wasn't comfortable buying a replacement (couldn't easily find one online) so I (over)paid a company to do it.
Posted on 8/6/14 at 7:25 am to benstudley
Turn it off and have it checked ASAP. I just had to have a forklift replacement of the entire system because of a similar situation. The compressor ended up suffering damage and grounding out.
Posted on 8/6/14 at 12:22 pm to bosoxjo13
Check the drip pan. There's usually a kill switch on it to shut things down when the pan fills up with water.
Posted on 8/6/14 at 2:17 pm to bosoxjo13
Your drip pan is probably full of water. Once it fills up, the float will shut the air handler down.
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