Having problems with your Air Conditioners ?

A/C UNIT WILL NOT COME ON

\015 I'VE CHANGED THE THERMOSTAT, I CHANGED THE CONTACTOR TODAY AND STILL IT DOESN'T COME ON. ITS A RUDD CENTRAL UNITFOR A THREE BEDROOM HOME.SOMEONE TOLD ME IT MAY BE A LOW VOLTAGE PROBLEM/TRANSFORMER.HELP! HELP!\015

Answers :

If you switch the fan switch at the thermostat (I assume it has a fan - on - auto - switch), does the indoor fan come on at all? If not you could have a fuse on the indoor board out (on newer systems), or a bad transformer.
Now what caused this?
If you don't have an idea electrical surge, a wire touching someplace (possibly when you changed the thermostat out??) that should not have, and / or possible a bad contactor could have caused it.
An amp meeter on 1 line of the transformer when powered back up showing less than 2 amps is acceptable but over 2 amps and definitely over 4 and your fuse will pop again (or transformer. Just test it and be ready to unplug if it shows this condition).
I assume you have a clamp on amp meter or can borrow one for this test.

If this helped you understand and correct your problem plaese rate me as high as you can. If you need more please post back with what you have found and I'll post back to you. Thnaks for using fix ya and good luck.

Repair Help & Product Troubleshooting for Air Conditioners
You need a second opinion or clarification ? ask it in the comment box OR you can Ask Your Own Question

Tips for a great answer:

  • Please provide as much detail as possible as this will allow our members to better understand and respond to your Comment
  • If you need clarification, ask it in the comment box
  • It's 100% free, no registration required

Suggested Questions/Answers :

It is recommended you read all this kind of situations

My fridgedaire window unit A/C and heat won't come on. I had replaced an outside light fixture a couple of weeks ago and had turned off the circuit breaker that affected this unit too. Now the unit won't come on AT ALL. I've unplugged the unit, then flipped breaker off then on again. Then plugged back in and hit "Reset" Button on the plug, then waited at least 3 min. as instructed, but still no power. The light on the plug doesn't even come on when I hit the test button. Could it be a faulty cor


Plug a light into the outlet used for the A/C, if the light does not come on when reset then the circuit breaker that provided the power to the outlet need to be reset or replaced. ... Frigidaire FAS257S2A WallWindow Air Conditioner

I have a Sanyo Split System the indoor unit is a KHS0921 and the outdoor unit is a CH0921. When i first turn the indoor unit ON the fan will run for a few minutes and then go off. The outdoor unit never comes ON when there is a cll for cooling. The only way to get the fan to come ON again is to turn the breaker OFF and then back ON. The Operation loght will come ON when the fan is running but it will start flashing when the fan goes OFF. What should i look for?


... Sanyo Split System Air Conditioner

Model(MC42B-1A) The unit stoped working. Now it will not come on. There is 240v at the outside unit. When the contactor is pushed in manualy it starts and runs untill released. Filters are new, thermostat is set below room temp. Settings are on cool, fan(auto). Tried to switch fan to manual and it did not come on. Swithced it over to heat and it still did not come on. All breakers are good. I am at a loss. Why will my unit not come on and run.


Hello. It appears that your thermostat is bad. Change it and you should be up and running again. J. ... Air Conditioners

I purchased and LG Model# LP1010SNR on 8-3-10 at Home Depot. It was a floor model and did not come with an owners manual. It has a digital display screen. It is intended to run for several hours at a time as it is used for a greenhouse. When I went to check the AC unit. The display screen displayed (P2) and blinking. The AC unit will not come on. It has power but, will not come on. I turned to AC of and the reset button, etc., Again the unit comes on but will not operate. It beeps 5 times and st


What happens on this unit is it will suddenly stop followed by a series of chimes. You can reset the unit, but it will end with the same set of chimes. My unit display had a P2 code. As mentioned above, I drained the water (small amount actually) ... LG Air Conditioners

Electrical Schematic?? Hi, Here is our problem:  We have this unit installed in our desert vacation home in the wine "cellar" room, at times when we are not here, the electricity has gone out (even just for a second) and this unit shuts down and doesn't come back on until we come here and physically turn it on again. We are looking to bypass this so we don't have wine ruined while we are away.  How can we get this unit to come back on by itself?   Another problem is: this unit is installed in su


An easier solution would be to connect it to an UPS. May not be the cheapest though. ... Hitachi RAS-09UH Air Conditioner

Unit is a Samsung AS09A1VE Air conditioner Split System Unit turns on with remote, green light comes on with start bells. Another bell sounds yellow light comes on, unit switches off green and yellow lights start flashing, all in around 5 to 10 seconds, unit will turn off with remote, lights go out. I reset the unit by disconnecting power and reconnecting. Unit worked fine for several hours after that (although it did discharge some some small black debris. It then repeated the same proble


Hi,\015\012This sounds like a problem with it either being too cold outside or the unit is low in charge. What happens then is that the indoor coil getts too cold and the unit will shut down before is freezes over.\015\012The cold outside ... Air Conditioners

I have a Lennox Elite AC unit, and today I smelt a gas smell coming from inside the closet where my AC unit is. it smells like it's coming from the black box that comes with the unit.


Call ags co. ... Air Conditioners

I have a 1 year old LG LMU245HV with 3 indoor units (a 12K, and 2 9K btu). This is the second heating season and I have noticed that when any one unit is on the temperature coming out of the unit is not very warm. This however changes when I run a second or the 3rd unit. When I run 2 or more units there is plenty of heat coming out. What would cause this? Any ideas would be appreciated.


Hi,\015\012\015\012Is this a new saituation for this year??? \015\012My first thought is that the unit is over charged, but that could not be happening if the unit worked okay last year....\015\012If it worked okay kast year a ... Air Conditioners

I have a 5ton package unit electric/natural gas. unit is 2yrs old. There is 220 v0lts to the unit. unit will not come on. there was some voltage surge during bad weather at the time unit went down. the 3amp fuse is ok. the little red light does not come on. please help


This can only be 1--of 2 things, (the easy fix first, transformer or curcuit board is bad) .If you have 220 volts then check for power going into the transformer, (220 vt) and then power going out, (24-28vt) (90% of the time, its the transformer, ... Goodman Air Conditioners

I have a carrier 38ckc060370 that runs but the air is not cold coming out of the vents. i checked the copper line coming out of outdoor unit and is not cold either. does this mean that i need a recharge, or could there be some other problem? recently, i've had problems getting the unit to turn off, and had to use the breaker because it would not shut down on its own, but other than that, the unit has never had a problem. the unit is about 4 years old.


If the unit is not shutting down, then there is a chance the contactor has gotten stuck. This is not a good thing. If the contactor were to weld itself shut and the outdoor unit were to continue to run without the indoor fan running for an extended ... Carrier 38CKC060 Air Conditioner

MY GOODMAN CPKJ24-1A UNIT WENT DOWN.TOOK FAN OUT SAW WIRES SHORTED OUT AND MELTED COMING OUT OF FAN MOTOR I REPLACED THE FAN MOTOR .THEN REPLACED DUAL RUN CAPACITOR THEN THE SWITHING CONTROL. TRIED TO START UNIT FAN RUNS AT A VERY VERY LOW SPEED AND SORT OF WISTLES WHEN RUNNING ALSO UNIT IS NOT KICKING OVER EVEN HAD CAPACITOR CHECKED WHY WONT MY AC UNIT COME ON


... Goodman Air Conditioners

Excessive leaking The carrier unit has a drain pipe that come off of the unit it also has a peice of pipe that comes off of the unit and points staight up about 4-5 inches, in between these two is a little hole where you can actually see the water flowing. the unit is leaking from this point at different times during its cycle. Why? and How do I fix this?


This is a condensation drain, The pipes were probably just pressed together. it is actually a T fitting . The tubes just need to be fitted together and pushed together. the lower pipe drains to the outside of the house and the one pointing up is ju ... Carrier 38CKC042 Air Conditioner

Ruud UPNE- 036JBZ 2 years old (outside unit) Ruud Acheiver air handler 1 year old inside unit... outside unit will not come on. voltage (120) ready at contacts. push manually and it comes on. yellow wire and brown wire go to board. no power on these when inside unit is running. power bill has doubled......must be running off heater coils? What would be the next thing to check. I did look at thermostat seems to be working normal. Can't get knowledgeable help.


... Air Conditioners

I have a carrier 38ckc060370 that runs but the air is not cold coming out of the vents. i checked the copper line coming out of outdoor unit and is not cold either. does this mean that i need a recharge, or could there be some other problem? recently, i've had problems getting the unit to turn off, and had to use the breaker because it would not shut down on its own, but other than that, the unit has never had a problem. the unit is about 4 years old.


Hi, since you claim that the a/c is working but the air coming out is not cool, then you have a very low freon in the compressor and you need to refill the compressor, Or look for an air restriction. Check your filter first of all..Concer ... Air Conditioners

10yr Vulcan Central Heating unit. Had tech come out and said main fan unit was faulty. I replaced myself and still not working. I discovered the O/Temp manual switch had cut off power. When I reset the switch the unit comes on and all works except for my fan which then the unit heats up and cuts off.


I have the same problem, heating unit will not ignite, it trips out, i go into the roof cavity and remove the top of the unit (4 screws) and there is a motherboard, it has a Green light flashing what tells you the type of fault it has, mine has 3 Fla ... Air Conditioners

Outside unit will not turn on. Inside fan works fine. This intertherm unit is an upright, 6yrs old. Model number unkown. Fan will turn. No hum coming from unit. inside condenser sits on furnace model # E2EB-015Hb. Freon charging is outside on the lines coming from outside unit.


Hi! You may want to start on having the power supply checked. Good cause why the unit won't power up. Have the compressor checked too just to be sure. ... Intertherm Air Conditioners

I manage a small cottage complex in Yuma, Az. I have all LG window units. One of the tenants came to me last week and told me his unit would not come on. I was surprised by this because I had just had all of the units cleaned and charged by a licensed professional only a month before. There is absolutely no power going to the unit. It will not come on at all. What do you think could be the problem?


Unplug the unit, remove the control panel and check connections.If good, use a volt meter to see if you have voltage where the line cord connects. ... LG LWHD1200FR Wall/Window Air Conditioner

Does the orifice, which needs to be installed in the inside unit of an a/c for a house, come with the outside condenser? I had an a/c system installed and an orifice was never installed. the original company says that they only installed the inside unit, and dropped off the outside unit, and we had a different company install that. The original company says that the orifice comes with the outside unit and then needs to be installed inside. Is this true? ( not sure if i picked the correct produ


The orifice is the metering device inside the evaporator coil and comes installed from the factory in the coil itself. Some condensers do come with orifices taped to the side of the unit, but they only do that to ensure you have the right size orific ... Goodman CKL60AR60 Air Conditioner

AC/heat dual-pak unit comes on, or doesn't come on erratically. Shows the two lights on when the unit isn't on. Occasionally blows cold air when it's supposed to be heating. Is it the ther


... American Standard Asystat620/01f91w085 3-heat/2-cool Program Thermostat

Installed new compressor on Carrier 3 ton a/c unit. Compressor comes in, but only runs for about 2-3 minutes and then trips out. Have installed new compitcor. Have 24 volts coming in. Will not take freon charge. Liquid line coming back to compressor behind dryer is extremely hot. Do you think the dryer may be stopped up causing unit not to take charge?


Hello,The trpping off may be as a result of dirty condenser. please clean the condenser to stop this problem.The dryer may be stop up causing unit to take a charge.Thanks ... Carrier 38CKC036 Air Conditioner

I have a window air conditioner. When it runs for several hours it will trip the breaker. I have had the unit for 5 years. I bought it used and even though it has always shaken when the air compressor comes on it has cooled fine. Recently, however, my landlord changed the circuit breaker (had an electrician come out to do this and supposedly everything is working find). However when I pluuged the unit back into the plug for this circuit, the unit would not even operate for 10 mintues withou


It's probably fine even though it jiggles and makes noise. I would ask the landlord to change the circuit breaker again and ask the electrician what the amps were for the breaker he took out and the one he put in. \015\012\015\012Hopefull ... Whirlpool Air Conditioners

Out door unit on a armstrong heat pump will not come on unit # SHP10B30A-2A using the thermostat, unit will come on by pressing in on the contactor.


Hello\015\012Have a look at the low volatage tranformer,should show 115 volts in and 24 volts out,when unit is calling for ac.There may be a small overload button on the side of the transformer,check that its pushed in.\015\012\015\ ... Air Conditioners

Fujitsu asu15rlq just installed timer light flashes twice every 10 seconds. Inside unit fan comes on outside unit does not come on. Timer light keeps flashing when inside unit is turned off . Please help


... Air Conditioners

A/C unit air handler comes on inside but outside compressor does not come on. The contacts are not working. If I hold down the contacts the compressor comes on and unit works.


Check and find out if you have 24 volts across the terminals for the coil of the contactor. If you have 24 volts across the terminals and the contactor does not pull in change the contactor with one of the same ratting. If you do not have 24 volts ac ... Ruud Air Conditioners

Airconditioner has power and buttons are ligting up, the unit either just does not come on when power button is depressed (although it makes a beep) or when it does come on it rumbles without the fan operating or air coming out. Unit has been running fine for the last year.


Hello,\015\012\015\012Please provide the make and model of the aircon. Thank you. ... Air Conditioners

A detailed question is important to get you a relevant answers

  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
all rights reserved to the respective owners || www.ad-trader.net || Terms of Use || Contact || Privacy Policy
Load time: 0.0615 seconds