Customer Support 7 days a week

Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

New Topic Post Reply
Options
Go to last post Go to first unread
mgoltsman  
#1 Posted : Tuesday, June 9, 2015 7:38:05 PM(UTC)
Quote
mgoltsman

Rank: Member

Groups: Registered
Joined: 6/9/2015(UTC)
Posts: 3

I verified that my fridge does generate lots of frost on the evaporator coil, and that it defrosts the said coil when the defrost timer so commands. Still, the fridge is not cool at all. I determined that the evaporator fan doesn't run, but the problem is not the motor but lack of power to it. I tried some bare wires connected to the wall outlet (don't try this at home, kids!) and the fan runs like gangbusters. But measuring the power to the evaporator fan with compressor running and coil frosted shows zero volts AC. SO here's the question - what would prevent power from being applied to the evaporator fan? I read something about the temperature control thermostat deciding when and how long the evaporator fan runs. Does this thermostat control both the fan and the compressor in parallel? In that case the fact that the compressor runs but the fan doesn't would indicate a wiring problem of some sort. Any help would be greatlly appreciated - this milk is not going to get any fresher!
Sponsor
See inside of your appliance - diagrams and part photos for virtually every model.

powered by AppliancePartsPros.com
 
denman  
#2 Posted : Wednesday, June 10, 2015 2:38:25 AM(UTC)
Quote
denman

Rank: Advanced Member

Groups: Senior Expert
Joined: 2/29/2008(UTC)
Posts: 19,638

Thanks: 1 times
Was thanked: 11 time(s) in 11 post(s)
Here are your parts
Parts for Amana SQD26VL / P1315203W L Refrigerator - AppliancePartsPros.com

See the attachment for the tech sheet.

[COLOR="Blue"]Does this thermostat control both the fan and the compressor in parallel?[/COLOR]
Not on this unit.
The condenser/compressor fan is in parallel with the compressor but not the evaporator/freezer fan.

The control thermostat regulates when the fan is on.
Below is the circuit
H (line) , Rd wire , TEMP CoNTRoL thermostat , YL wire , EVAP FAN , BR wire , DeFrost ThERMastat , OR wire , DEFrost HeaTR , WH wire , Neutral.

So for the fan to run the control thermostat must be closed. It also turns on the compressor but through a different circuit via the defrost timer.
The defrost thermostat must be closed (below freezing).
Also the defrost heater must be OK.

Note that the evaporator motor current is so low that it does not heat up the defrost heater.

I suspect a bad wire or connection since you say that the compressor runs and defrost works.
File Attachment(s):
SQD26.pdf (286kb) downloaded 8 time(s).
THIS FORUM IS DEAD!!!!!!!
mgoltsman  
#3 Posted : Wednesday, June 10, 2015 5:19:17 AM(UTC)
Quote
mgoltsman

Rank: Member

Groups: Registered
Joined: 6/9/2015(UTC)
Posts: 3

Originally Posted by: denman Go to Quoted Post
I suspect a bad wire or connection since you say that the compressor runs and defrost works.


Thanks for the explanation, I was beginning to suspect as much. Looks like I get to save on parts and to spend half a day tearing the unit apart and ringing through wires. :mad:
denman  
#4 Posted : Wednesday, June 10, 2015 6:32:57 AM(UTC)
Quote
denman

Rank: Advanced Member

Groups: Senior Expert
Joined: 2/29/2008(UTC)
Posts: 19,638

Thanks: 1 times
Was thanked: 11 time(s) in 11 post(s)
One of the first things I would check is the defrost thermostat.
Make sure it is 0 ohms when frozen.
Also if it id deformed/bulged replace it even if it measures OK.
THIS FORUM IS DEAD!!!!!!!
mgoltsman  
#5 Posted : Wednesday, June 10, 2015 10:39:38 AM(UTC)
Quote
mgoltsman

Rank: Member

Groups: Registered
Joined: 6/9/2015(UTC)
Posts: 3

Originally Posted by: denman Go to Quoted Post
One of the first things I would check is the defrost thermostat.
Make sure it is 0 ohms when frozen.
Also if it id deformed/bulged replace it even if it measures OK.


Oh. I can check the defrost thermostat of course, but I assumed that it was OK since the heater comes on without a problem? Is it because it is the most frequently failing item?

Thanks,
Mike.
denman  
#6 Posted : Wednesday, June 10, 2015 12:19:40 PM(UTC)
Quote
denman

Rank: Advanced Member

Groups: Senior Expert
Joined: 2/29/2008(UTC)
Posts: 19,638

Thanks: 1 times
Was thanked: 11 time(s) in 11 post(s)
Yes it is.
THIS FORUM IS DEAD!!!!!!!
Quick Reply Show Quick Reply
Users browsing this topic
New Topic Post Reply
Forum Jump  
You can post new topics in this forum.
You can reply to topics in this forum.
You can delete your posts in this forum.
You can edit your posts in this forum.
You cannot create polls in this forum.
You can vote in polls in this forum.