HPS18BTHFRWW Compressor current draw only 0.45amps

bazar01

Premium Member
Joined
Mar 28, 2019
Messages
10
Location
GA
Model
HPS18BTHFRWW
Brand
Hotpoint
Age
1-5 years
Ref stopped cooling but compressor and condenser fan are both running.
When I measured the compressor current draw with a clamp meter, it read only 0.45amps.
Refrigerator label says 110-127VAC, 60Hz, 6.5 amps.
What could be the issue?
Thanks.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,533
Location
Ontario, Canada
Hi,

Refrigerator label says 110-127VAC, 60Hz, 6.5 amps.
6.5 amps is the entire refrigerator....all at once.

When I measured the compressor current draw with a clamp meter, it read only 0.45amps.
What is the LRA on the compressor tag?
I tried to look up by your model#...most showed 7.5 to 10.0 LRA.
This would be .75 to 1 amp running....approx.

0.45 is low, might be an inefficient compressor not working hard, a system leak and low refrigerant gas will also allow the compressor to run but not work very hard and draw less current.

Ref stopped cooling but compressor and condenser fan are both running.
No frost at all on the evaporator/cooling coils?

jeff.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,533
Location
Ontario, Canada
LRA is 9.2 amps.
So running amps should be approx 0.90 amps of the compressor only.

No frost on evaporator.
= a major system problem. New refrigerator time or BIG $ repair.

jeff.
 

bazar01

Premium Member
Joined
Mar 28, 2019
Messages
10
Location
GA
I think the compressor has a bad valve.
I brazed a charging valve on the compressor so I can pressure and leak test. It held pressure of 80 psi for 24 hours.

I found an exact replacement new compressor.
I won't be able to work on it until first week of May since I will be on vacation for 3 weeks.
It's for a rental unit. I hope to fix it for $65 and 3 hours of sweat. I have the tools to replace it.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,533
Location
Ontario, Canada
I think the compressor has a bad valve.
Inefficient then.
Keep us posted.

jeff.
 

bazar01

Premium Member
Joined
Mar 28, 2019
Messages
10
Location
GA
Got the brand new compressor off ebay installed today.
Triple evacuated using nitrogen and breaking vacuum with R134A up to 5 psi on low side.

She is cooling now and running at 0.78amps and low pressure of 8 psi.
Is 8psi a good low side pressure?

Thanks.
NewCompressorInstalledresized.jpg
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,533
Location
Ontario, Canada
Is 8psi a good low side pressure?
Closer to 0 is better, might be slightly over charged.

jeff.
 

bazar01

Premium Member
Joined
Mar 28, 2019
Messages
10
Location
GA
I looked at the refrigerator this morning and it made ice on the ice tray.

The compressor suction line was cold and sweating and there was no frost.

The compressor was running and it stopped 3 minutes after.

I think I will leave it alone for now.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,533
Location
Ontario, Canada

bazar01

Premium Member
Joined
Mar 28, 2019
Messages
10
Location
GA
Hi Jeff. Thanks.

I checked it again today and the compressor suction line has white frost about 8 inches before the compressor inlet. It has condensation/sweat 8 inches long into the compressor.

Is this good or bad? Is it time to weigh the refrigerant? I don't have a scale though.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,533
Location
Ontario, Canada
I would purge out a little until that frost goes away.
In my area the temp will only get better and warmer....this would increase the pressures inside and cause more frosting/sweating.

jeff.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,533
Location
Ontario, Canada
Your welcome!

jeff.
 

bazar01

Premium Member
Joined
Mar 28, 2019
Messages
10
Location
GA
Update:
I purged a little out and saw the frost retreated a little,
I got the pressure down to about 1 psi and the frost fully retreated.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,533
Location
Ontario, Canada
That sounds much better :)

jeff.
 
Top