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Old 08-21-2009, 08:34 PM   #31
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Noisy solenoid chatter and compressor won't kick in now


Also forgot. I read 120VAC off the wall circuit with my meter so it may be fairly accurate. Don't know about the ohms accuracy though.

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Old 08-21-2009, 08:50 PM   #32
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Noisy solenoid chatter and compressor won't kick in now


Day and Night was made by Carrier I believe. I could be wrong. When I tested my coil for you I put it on the Rx10 scale for more accuracy and divided by 10. Without the clips you are reading your body and your coil may be even lower than 6.6 and you need to zero the meter if analog type and have an accurate meter.
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Old 08-21-2009, 08:52 PM   #33
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Noisy solenoid chatter and compressor won't kick in now


Ok the coil does magnetize however, and you hear the valve try to move with just the 11 VDC.
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Old 08-21-2009, 08:56 PM   #34
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Noisy solenoid chatter and compressor won't kick in now


Aw Christ. i took the wrong pill! The OP is tripping and seeing DC instead of AC.
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Old 08-21-2009, 10:39 PM   #35
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Noisy solenoid chatter and compressor won't kick in now


I rigged up some jumper wires using 18 gauge speaker wire and alligator clips and the AC immediately started working as soon as I connected things. It's 8:30 pm in California and my house is on 90 degrees upstairs. Guess it will take awhile to cool down.
I would really like to replace the solenoid and transformer since they appear degraded. I tried an appliance place in Sacramento for the solenoid yesterday and they sent me over to American Refrigeration which turned out to be a wholesaler. Does anyone know an internet site or possible source for parts this old?
Thanks for all the help guys. Hope nothing else breaks for awhile.
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Old 08-21-2009, 10:47 PM   #36
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Noisy solenoid chatter and compressor won't kick in now


For your info I'm reading 16.2VAC across the red and white wires with everything engaged.
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Old 08-21-2009, 10:55 PM   #37
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Noisy solenoid chatter and compressor won't kick in now


Thats just about dropout voltage.

Its getting too low.
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Old 08-22-2009, 12:11 AM   #38
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Noisy solenoid chatter and compressor won't kick in now


Well it gets crazier. The AC is running fine and the house is down 3-4 degrees. I walked past the thermostat and noticed the AC is OFF! How did I manage to bypass the thermostat by doing what I did? The red and white wires coming from the ceiling appear to have to be hooked up even though they are bypassed or the compressor stops.
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Old 08-22-2009, 04:55 AM   #39
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Noisy solenoid chatter and compressor won't kick in now


You didn't hook your jumpers to the same place as the red and white of the SV were.
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Old 08-22-2009, 09:37 AM   #40
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Noisy solenoid chatter and compressor won't kick in now


Quote:
Originally Posted by David H10 View Post
I rigged up some jumper wires using 18 gauge speaker wire and alligator clips and the AC immediately started working as soon as I connected things.
So it is not a high resistance upstream in the 240v supply.
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Old 08-22-2009, 09:41 AM   #41
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Noisy solenoid chatter and compressor won't kick in now


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So it is not a high resistance upstream in the 240v supply.
Nope. Or it wouldn't have been able to run the fan.
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Old 08-22-2009, 09:43 AM   #42
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Noisy solenoid chatter and compressor won't kick in now


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Well it gets crazier. The AC is running fine and the house is down 3-4 degrees. I walked past the thermostat and noticed the AC is OFF! How did I manage to bypass the thermostat by doing what I did? The red and white wires coming from the ceiling appear to have to be hooked up even though they are bypassed or the compressor stops.

The coil may have overloaded the thermostat, and welded its contacts closed.
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Old 08-22-2009, 12:50 PM   #43
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Noisy solenoid chatter and compressor won't kick in now


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Nope. Or it wouldn't have been able to run the fan.
The Geek High Command has now notified me that if I keep botching electrical troubleshooting I will be demoted to the rank of Geek, 3rd Class.
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Old 08-22-2009, 01:02 PM   #44
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The Geek High Command has now notified me that if I keep botching electrical troubleshooting I will be demoted to the rank of Geek, 3rd Class.
Don't worry me and the "boys" will make him an offer he can't refuse.

You're safe.


LOL, glad to see your taking it in stride.

I wish i was smart enough to be a geek.
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Old 08-22-2009, 09:23 PM   #45
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Noisy solenoid chatter and compressor won't kick in now


I figure the red and white wire must run to the thermostat so I am bypassing the thermostat when I jumper straight to the solenoid. That's why the compressor runs even with the thermostat in the off position. The thermostat is a White -Rodgers 4001/2.
Although I read 18.6VAC across the transformer, I read 27.2 red to white at the thermostat. If I jumper red to white the gas pilot fires off. If I jumper red to green the blower motor starts and keeps going for awhile even if I remove the jumper. When I jumper the Yellow to the red, the compressor eventually starts but not right away. When I remove the jumper it stops immediately. If I restore the jumper, it eventually starts up again after a short delay.
Bad thermostat?

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