Log in

View Full Version : Ac unit will not turn on


campi1
Apr 26, 2009, 06:57 PM
Hi the unti just will not turn on. It is a lennox elite 13 and only 5 years old. Is there a reset button anywhere we have checked the circuits and fuses

Joshdta
Apr 26, 2009, 07:04 PM
Does the inside blower run?

campi1
Apr 26, 2009, 07:21 PM
The inside blower runs the outside unit does not kick on

Joshdta
Apr 26, 2009, 07:22 PM
OK, I can tell you what to look for outside if you have time and would like to try to fix it.

campi1
Apr 26, 2009, 07:23 PM
I checked all fuses and thermostats and circuits. This si the first time we tried to use it this year

Joshdta
Apr 26, 2009, 07:23 PM
What brand unit?

campi1
Apr 26, 2009, 07:23 PM
Yes I would like to try and fix it if I call the company it will be a fortune

Joshdta
Apr 26, 2009, 07:24 PM
OK, first is it just a ac unit or a heat pump?

campi1
Apr 26, 2009, 07:24 PM
Lennox elite 13

campi1
Apr 26, 2009, 07:25 PM
Just a cental ac unit

Joshdta
Apr 26, 2009, 07:27 PM
OK go outside and remove the pannal where the power wire goes in. What you are going to be looking for is the contactor.

http://yueqing-shi-shinaidi-electrical.tradenote.net/images/users/000/102/716/products_images/283101.jpg

See the 2 butons in the middle. You can push them with a screw driver to see if the unit comes on. If it does then your problem is in th t-stat wiring some where. If it doesn't then we have a high voltage problem.

campi1
Apr 26, 2009, 07:41 PM
OK be right back,we had to pull the fuse to push those buttons and there is deffinetly electric going there but the unit does noting

Joshdta
Apr 26, 2009, 07:42 PM
If you push the bottons with the fuse in the unit should come on. If it does sound like you have a high or low pressuer switch problem.

campi1
Apr 26, 2009, 07:44 PM
If we push the buttons with the fuse in we get electrocuted (LOL) it sparked a little

Joshdta
Apr 26, 2009, 07:47 PM
Yea it will spark just a bit the wires are on the top and the bottom that have the power as long as you stay on the buton you will not get shocked.

Joshdta
Apr 26, 2009, 07:47 PM
Have you had the ac on a few times already this year?

Joshdta
Apr 26, 2009, 07:49 PM
Also I is the any type of control board in there beside the contactor?

campi1
Apr 26, 2009, 07:58 PM
No this is the first time and there was no control board

campi1
Apr 26, 2009, 07:59 PM
The unit did not kick on whenthose buttons were touched

campi1
Apr 26, 2009, 08:00 PM
The dual capacitator was replaced last year for a mere $350

Joshdta
Apr 26, 2009, 08:00 PM
OK, then odds are you are low on freon, did the fan start to spin when you pushed the contactor in and it sparked?

Joshdta
Apr 26, 2009, 08:01 PM
Wow 350 for a compasitor, I am not making enough money I only charge $45

Joshdta
Apr 26, 2009, 08:01 PM
OK and you are sure you have power to the fuse box outside?

campi1
Apr 26, 2009, 08:04 PM
I wish you lived in NY then! We have power, the fan did nothing, no noise of any sort

campi1
Apr 26, 2009, 08:05 PM
How often should the freon be charged

campi1
Apr 26, 2009, 08:05 PM
I do not knopw much about the freon situation, rough estimate on cost to have this done

Joshdta
Apr 26, 2009, 08:06 PM
Do you see your $300 capasitor in there? Check to see if it is swolen where the wires connect.

campi1
Apr 26, 2009, 08:07 PM
No it looked fine why?

Joshdta
Apr 26, 2009, 08:07 PM
Hear about $14 pre pound, there probably about $30 per pound plus a service call, but if it did not run when you pushed that in you have anouther problem

campi1
Apr 26, 2009, 08:07 PM
First thing I checked

Joshdta
Apr 26, 2009, 08:08 PM
OK do you have fuses in the power box outside or just a pull disconnect?

campi1
Apr 26, 2009, 08:09 PM
A large double fuse

campi1
Apr 26, 2009, 08:10 PM
But there is deffineytly power getting to the conductor thing I touched before

Joshdta
Apr 26, 2009, 08:11 PM
OK, well form what we have done so far. If you pushed in the contactor with the power on.. the only 2 things that would keep it from running is a bad compasitor, or no power. Could 1 side of the doube fuse have blow?

campi1
Apr 26, 2009, 08:15 PM
I will try to replace it, how difficult to replace a compasitator

campi1
Apr 26, 2009, 08:16 PM
Should I call them back should it last more than 2 years I know the part is cheap

Joshdta
Apr 26, 2009, 08:17 PM
Do you have a volt meter?

campi1
Apr 26, 2009, 08:21 PM
yes, it is too dark now to use it I =can try in the morning where

campi1
Apr 26, 2009, 08:22 PM
I guess for tonight we will sweat and I will try again tomorrow before I give in and call. First I guess I check the voltage, then check for a swollen capactitator and if nothing there then call for service?

Joshdta
Apr 26, 2009, 08:23 PM
On that contactor. Check the 2 termanals at the bottom for 220 volts, then the 2 termanal at the top for 220 volts. Then the 2 small blue wires on the sides check them for 24 volts and let me know what you find

Joshdta
Apr 26, 2009, 08:24 PM
If you have 220, and 24 both then yes I would say you need to call a repair man. If you do not have 1 or either we can try a few more things before you unload the bank again.

campi1
Apr 26, 2009, 08:26 PM
I will thank you