broke low voltage cable on outside unit

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  #1  
Old 08-05-18, 04:06 PM
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broke low voltage cable on outside unit

Hello,

I was mowing the lawn passed the weed eater to close to the outside unit and broke the low voltage cable. I turned off the AC and pulled the outside breaker as quickly as I could. I found some extra AC thermostat cable and spliced the cable. I know the splice it good. From there I have reseated the inside and outside breakers and zone board, but still either the inside or outside unit will not come on. My unit is a zoned system and the zone board shows no faults and says it is on and blowing cold air, but none of the units are on.

Any Suggestions?
 
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Old 08-05-18, 04:19 PM
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Welcome to the forums.
I'd have to assume that when you damaged the wiring that it shorted and damaged something inside.
Do you have meter to test for voltages ?
A picture of the zoning board would be helpful too.... How-to-insert-pictures
 
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Old 08-05-18, 05:51 PM
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Yes, I have a meter. What should I test?
 
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Old 08-05-18, 06:16 PM
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I have checked the outside unit and the electrical box says it doesnt have any fuses. It is just a metal breaker. Not sure if there are other fuses.
 
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Old 08-05-18, 07:28 PM
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In the red area....,. those two wires (R and C) go to a transformer.
Check for 24vAC on those two wires.
 
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Old 08-06-18, 04:40 AM
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I would check inside of the furnace for a popped 3 or 5 amp automotive fuse. It will often be on the control board.

Lennox furnaces may have a low voltage breaker.
 
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