Posted: 7/5/2017 11:07:24 AM EDT
|
This is the second time this has happened.
I was trying to sleep and noticed that it seemed warm in the house. The fan for the AC was running, but the air coming out wasn't cold. I checked the breakers, and everything was on. I flipped off the breakers for the AC only (not including the fan), waited, and flipped them back on. As I did that, I could hear the AC unit on the roof start up. I went back inside and noticed that the air coming from the ducts was cool. I did the same procedure a day or two earlier with the same results. Any ideas of what could be causing this? 
I live in NM and have a flat roof on my house. I don't like it, but we usually don't get that much rain or snow. |
|
If it does it again, before you reset the breakers, go outside and see if the outside unit is running.
If not, start there. If your capacitor has a swolen up looking top like a can about to explode, there is your problem. Matter of fact just go look at the capacitor and see if the top is still flat. |
|
I can't help with your problem, but I have a question.
Why is your unit on the roof? I have seen this on home improvement shows. What I assume is the compressor unit mounted on the roof, in full sun. This must be a western US thing, I have never seen one mounted on a roof down south. Why? |
|
Quoted:
I can't help with your problem, but I have a question. Why is your unit on the roof? I have seen this on home improvement shows. What I assume is the compressor unit mounted on the roof, in full sun. This must be a western US thing, I have never seen one mounted on a roof down south. Why? |
|
Quoted:
I've never seen a residential one mounted on the roof up here but every Walmart/stores like that all have them roof mounted Quoted:
Quoted:
I can't help with your problem, but I have a question. Why is your unit on the roof? I have seen this on home improvement shows. What I assume is the compressor unit mounted on the roof, in full sun. This must be a western US thing, I have never seen one mounted on a roof down south. Why? |
|
Quoted:
I can't help with your problem, but I have a question. Why is your unit on the roof? I have seen this on home improvement shows. What I assume is the compressor unit mounted on the roof, in full sun. This must be a western US thing, I have never seen one mounted on a roof down south. Why? |
|
Quoted:
I've never seen a residential one mounted on the roof up here but every Walmart/stores like that all have them roof mounted 
|
|
Are you positive the breaker wasn't tripped? If a breaker is tripped, the little 'switch' will still be in the on position. Turning it off, then back on again will reset a tripped breaker.
I had this same exact issue, and it ended up being a bad breaker that would only trip sometimes. |
|
Quoted:
I can't help with your problem, but I have a question. Why is your unit on the roof? I have seen this on home improvement shows. What I assume is the compressor unit mounted on the roof, in full sun. This must be a western US thing, I have never seen one mounted on a roof down south. Why? |
|
Quoted:
Fault with outdoor unit, brain is locking it out and you're resetting fault lockout by cutting power. Might be a good idea to call someone if it happens again. It's trying to tell you something |
|
Quoted:
Quoted:
Quoted:
I can't help with your problem, but I have a question. Why is your unit on the roof? I have seen this on home improvement shows. What I assume is the compressor unit mounted on the roof, in full sun. This must be a western US thing, I have never seen one mounted on a roof down south. Why? |
|
Quoted:
Lol at the capacitor comments. Resetting it won't reset a capacitor. It will reset a safety control.
Could be a lot of things people. Call a hvac tech. |
|
Quoted:
Might be a bad start/run capacitor on the condenser unit outside. Â In simple terms the capacitor is what gives the compressor a 'jolt' of electricity too start up because they draw quite a few amps on startup. One "Capacitor" and 2 hours of service call (included travel time) fixed it. Here in Kali, about $80.00 Total Price. |
|
Quoted:
i have seen a lot of them on older hoses in Vegas and in Cali. It takes up space, and I could see where some people would rather have the unit on the house, because it takes up a 36" X 36" foot print. Also, the noise that one hears inside the house is prob is prob less when mounted on the roof. |
|
Quoted:
We chose to have ours mounted on the ground, next to the house. (Cali, add-on unit) It takes up space, and I could see where some people would rather have the unit on the house, because it takes up a 36" X 36" foot print. Also, the noise that one hears inside the house is prob is prob less when mounted on the roof. Quoted:
Quoted:
i have seen a lot of them on older hoses in Vegas and in Cali. It takes up space, and I could see where some people would rather have the unit on the house, because it takes up a 36" X 36" foot print. Also, the noise that one hears inside the house is prob is prob less when mounted on the roof. |
| Wonder how that complicates a roof replacement? |
|
As a general rule, commercial units are roof mounted due to their size and less work/materials on new construction.
The trunk lines are directly underneath and less copper to run. If mounted on the ground of a big biz, they would need to be scattered around for different zones and would take up valuable real estate. Some specialty cooling units are ground mounted and put in one area to stay self contained. |
| The giant duct screams swamp cooler. |
|
Quoted:
You and the 1st poster are the only 2 that have a clue.It's always the capacitor to these backyard a/c mechanics.If it comes back on after you cycle power you are resetting the comp. lockout board/relay.On many units when a safety trips it will lock the system out so no further damage is done.In your area it's a good bet the high pressure switch is taking it out. "But I replaced the capacitor and it started working!"And even a blind squirrel finds an acorn every now and then.
this is a guessing game to make yourself feel better because you want to think its something stupid and cheap. which it could be, your tstat could be shitting the bed and killing power to not energize the contactor which would shut the compressor off.... call a tech. |