Central air won't cool at night

jtwtechJuly 15, 2011

This is an ongoing problem, and I have posted on here before about it. No one seems to know what's going on. FWIW, I have not had anyone come to my house to look at this problem.

This has been going on for several years, but a real heat wave is here, and it's going to get uncomfortable. My house stays cool throughout the day, but when night comes the fan runs, but the outside ac unit ( I think this is called the evaporator? ) will not turn on. The a/c runs fine from morning until night. It has happened for as long as I can remember. I have gone outside to check the a/c and I can hear a clunk or clicking sound every now and then.

It's just so strange that it only happens at night, but it's like clockwork. Any ideas or help appreciated.

Thank you for reporting this comment. Undo
juliekcmo

Just asking the obvious...what kind of thermostat do you have? If it is programmable, how is the program set?

    Bookmark   July 16, 2011 at 1:49AM
Thank you for reporting this comment. Undo
jtwtech

It is programmable. I have verified that it is not the thermostat. I changed the thermostat but also, our thermostat is usually on hold to maintain the same temp. Also at the advice of someone ( I can't remember exactly what I did at the time) but I shorted , If I remember correctly, R G and Y on the thermostat at night. Same thing, fan only ran.

    Bookmark   July 16, 2011 at 2:16AM
Thank you for reporting this comment. Undo
weedmeister

Is this a heatpump?

    Bookmark   July 16, 2011 at 4:58PM
Thank you for reporting this comment. Undo
maryland_irisman

Have you checked to see if there is ice forming on the inside coil at night?

    Bookmark   July 16, 2011 at 11:19PM
Thank you for reporting this comment. Undo
jtwtech

It is not a heat pump, and no I have not checked for ice at night. I'll do that in a bit.

    Bookmark   July 17, 2011 at 1:50AM
Thank you for reporting this comment. Undo
tigerdunes

jtw

a nice anecdotal story with few facts.

let's get some specifics.

your location?

brand, mdl, age, size of existing system?

amount of living area unit serves?

home is sgl story or two story?

location of ductwork?

thermostat setting?

average high outside temperature?

insulation qualities of home?

filters regularly changed?

last time system was service?

any idea of supply temperature? if not, find out with dig thermometer. how about return temperature? if not find out.

why accept this situation without an experienced HVAC pro checking your system out?

IMO

    Bookmark   July 17, 2011 at 9:40AM
Thank you for reporting this comment. Undo
heatseeker

So your having a problem with your unit for a few years and haven't called anyone out? unbelievable. Your compressor sounds like its overloading. keep on running it and soon it will go poof. Up in smoke.

    Bookmark   July 20, 2011 at 3:28PM
Sign Up to comment
More Discussions
New HVAC install in So Cal
Hi Everyone, I just got a quote from Home Depot contractor....
revlimit
Blown in insulation vs spray foam
I am looking for advice. I have a home built in 2000...
mkrafczyk
Who do I call about a whole-house fan?
I'd like a whole house fan. This might be a DIY project,...
elofgren
Maytag/Nordyne/Nortek HVAC
Wanted to share my HVAC experience. Hopefully save...
bgfuller
Thoughts on proposed HVAC system?
To start: my house is two-level (main plus upper)...
gbleeker
Sponsored Products
Comfort Dreams Select-A-Firmness 11-inch Queen-size Memory Foam Mattress
Overstock.com
Country & Blues 15-Oz. Mug - Set of Four
$19.99 | zulily
Kids Kendall Denim 42-Inch x 84-Inch Blackout Window Curtain Panel
$17.95 | Bellacor
Disney Accent Lamp: 7.8 in. Princess Figural Crown Eva Lamp BK312052
$11.98 | Home Depot
Twilight 12 Chandelier by LBL Lighting
$1,032.00 | Lumens
Charleston Outdoor Wall Mount by Troy Lighting
$354.00 | Lumens
9-Foot Aluminum Thermometer/Lighted Umbrella w/Crank and Tilt
Overstock.com
ZUO Lamps Supernova 21.7 in. Table Lamp 50006
Home Depot
© 2015 Houzz Inc. Houzz® The new way to design your home™