Central Air Unit Not Blowing Cold....


Old 08-07-13, 09:13 AM
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Central Air Unit Not Blowing Cold....

As the title states our air isn't blowing cold. It sounds like the compressor "clicks" on for a second and then shuts right down. It does this every minute or so.

I've worked on auto a/c systems many times but I'm not sure how to diagnose a central a/c unit. Could someone walk me through any troubleshooting procedures? I do have someone who can recover the refrigerant before replacing any parts if need be.


Last edited by hvactechfw; 08-09-13 at 03:02 PM.
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Old 08-07-13, 11:30 AM
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Can't help you with pressures but if the compressor isn't starting, the first step is to find out why.

I would:
- Check the run capacitor
- ohm out the compressor windings as per the schematic (with power off, capacitor discharged)
- If everything checks out fine, try a hard start kit

^If you don't understand these terms, it might be time to call a tech.
Old 08-07-13, 01:31 PM
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Thanks Muggle.....I'll do those tests when I get a chance and let you know what I find out. I really appreciate the help.
Old 08-07-13, 02:15 PM
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see my signature.... DO the tests as muggle stated.... You must be EPA certified to do anything with the refrigerant side of the system.... You should really hire a professional if you think it is refrigerant related.
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