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-   -   contactor not pulling in????? help (http://www.diychatroom.com/f17/contactor-not-pulling-help-67935/)

jeryfixit 03-30-2010 11:47 AM

contactor not pulling in????? help
 
hi, i have a split system 2 ton ruud that heats and cools 3 rms upstairs. The inside unit is working when t-stat calls for heat or cool but the condenser unit does not come on. I checked power on the 2 yellow wires that hook to the contactor and showing 26 volts going in so i thought the contactor was bad being it is about 16 yrs old,and so ireplaced the contactor cost 11.00 dollars. But now i have the same problem 26 volts to contactor but not pulling in, BUT when i manually press the contactor down everything works fine, on heat or cool mode. Can someone help me out with what i should check next or other most logical causes......thanks

Marty S. 03-30-2010 05:50 PM

Double check the new contactor and make sure it's not a 120 volt coil. With 26 volts present it should pull in if it's the right contactor.

beenthere 03-30-2010 06:31 PM

Did you check voltage across the coil, or did you check it to ground?

oren 03-30-2010 08:37 PM

when i check from 24 volt side terminal to opposite side of contactor terminal (or Across the coil) i don't get any reading. But if i run a jumper wire from common on the control board to the terminal opposite the 24 volt terminal it makes the contactor pull in.....

Scuba_Dave 03-30-2010 09:15 PM

Why a 2nd login ?

beenthere 03-30-2010 09:44 PM

Then the contactors were both fine. And you have a problem with your wiring.


PS: use the contact us to get the password of your first account if you forgot.

Unless Dave knows another way.

oren 03-30-2010 09:45 PM

had'nt actually registered with the site when i first posted, when i did user name was already taken so i had to change it

beenthere 03-30-2010 09:55 PM

Quote:

Originally Posted by oren (Post 421930)
had'nt actually registered with the site when i first posted, when i did user name was already taken so i had to change it


Both names are registered to you. And both are registered to the same IP address. And list the same email address.


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