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Old 01-11-2013, 10:57 PM   #31
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American Standard Freedom 80 LED Light Blinks 4 Times


OK, I think I was chasing my tail...

Sending a call for heat or just turning on the fan from the thermostat produces no fan at all. My problem has to be the fan like was suggested above. The lack of fan is making the heat chamber and exchanger too hot and turning off the system...it's gotta be. And some research shows I have a variable speed blower. Both elec connections on the blower are good. Yikes, this thing doesn't look cheap. And I just hit 10 yrs old on this system install this past Oct (2012)...darn. I need to get someone out to see if it's the blower motor or the module on the end of the motor. I may try to yank it tonight and then take it to a servicer for testing in the morning.
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Old 01-11-2013, 11:03 PM   #32
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American Standard Freedom 80 LED Light Blinks 4 Times


Don't do that. Have a tech come out but let them know it's a variable speed ecm motor. They should have a tool specifically to test the motor or you can simply purchase one and test it yourself. You can leave the motor installed in the unit.

They come relatively cheap to in the hundreds.

Cheap.


Expensive.
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Old 01-11-2013, 11:30 PM   #33
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American Standard Freedom 80 LED Light Blinks 4 Times


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Originally Posted by Doc Holliday View Post
Don't do that. Have a tech come out but let them know it's a variable speed ecm motor. They should have a tool specifically to test the motor or you can simply purchase one and test it yourself. You can leave the motor installed in the unit.
Thank you, Doc. I'll get someone to my place in the morning.
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Old 01-12-2013, 12:06 AM   #34
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American Standard Freedom 80 LED Light Blinks 4 Times


Sure thing. Most likely it'll be the module.There's a known resistor on the board in there that's known to fry on those things.

Let us know.
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Old 01-13-2013, 08:02 PM   #35
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American Standard Freedom 80 LED Light Blinks 4 Times


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Originally Posted by Doc Holliday View Post
Sure thing. Most likely it'll be the module.There's a known resistor on the board in there that's known to fry on those things.

Let us know.
Interesting twist...see this thread, post #25, 26. It's not that I purposely ignored Doc ;-), it's just that I cannot find an available tech this weekend with know how to test my ECM motor...so, I kept digging here on this site, and digging and digging. Very impressed with folks here and the great detail found.

Do, check out my current status here.

variable speed trane blower motor
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Old 10-26-2013, 06:21 PM   #36
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American Standard Freedom 80 LED Light Blinks 4 Times


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doesn't matter what scale its on.....just ohms is fine, then touch the leads together and observer what the reading is......now with the two yellow wires OFF the limit, touch 1 lead to each tab on the limit at the same time.....the results should be the same as when you touched the leads together, if not then the limit is tripped. remove the limit and smack it down on a hard flat surface and check it again. Also check you private messages.
harleyrider saved me at least $100 with his answer. The switch was stuck open so I gave it a whack and fixed the high limit switch right up. Now we have warm air again - in time for November's cooler temps! Thank you so much harleyrider!
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