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Old 09-19-2016, 03:46 AM  
o2284200
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Originally Posted by kok328 View Post
Fuse is good.
Start with line power to the unit.
Check the control board for flashing light code & reference code the legend on back of cover panel.
Check for 24volts on the secondary side of the transformer.
Check for 24vokts at the tstat.
Post back findings.
Forgive my ignorance but how do I do these, exactly?


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Old 09-19-2016, 04:42 AM  
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Forgive my ignorance but how do I do these, exactly?
http://www.homedepot.com/p/Commercia...301A/206177756


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Old 09-19-2016, 06:53 AM  
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How about one of these?
http://www.harborfreight.com/7-funct...ter-90899.html
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Old 09-19-2016, 06:59 AM  
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Same but different.
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Old 09-19-2016, 07:16 AM  
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Same but different.
Great, thanks! How do I do these tests with it?
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Old 09-19-2016, 07:22 AM  
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Great, thanks! How do I do these tests with it?
Some one that knows this stuff will help you with that part.
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Old 09-19-2016, 09:28 AM  
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If not comfortable using a DMM or don't know how to check for voltage then probably better to call a tech.
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Old 09-19-2016, 04:55 PM  
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If not comfortable using a DMM or don't know how to check for voltage then probably better to call a tech.
Newbie but comfortable with proper direction.
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Old 09-19-2016, 06:12 PM  
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Ok you can't check power at the tstat cause you don't have a common wire "C" terminal.
Start with Line power.
Open the cabinet and find where power comes in from the service switch.
Check for power between the unit and the switch.
If you have power there then move onto the transformer.
Post a clear pic of internals if you need help on that part.
Any flashing LED light on any control boards?
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Old 11-03-2016, 05:10 PM  
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Ok you can't check power at the tstat cause you don't have a common wire "C" terminal.
Start with Line power.
Open the cabinet and find where power comes in from the service switch.
Check for power between the unit and the switch.
If you have power there then move onto the transformer.
Post a clear pic of internals if you need help on that part.
Any flashing LED light on any control boards?
I have not noticed any flashing LED light on any control boards but I do have the service switch turned off. I believe the power comes in from the service switch with the 2 black & 1 green wires on the top right, which lead to a breaker in the top center. If correct, how do I use my multi meter to check for power between the unit and the switch?







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