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Home Brew Forums > Home Brewing Beer > DIY Projects > Kegerators and Keezers > is it my freezer or thermostat?
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Old 04-06-2013, 06:33 PM   #1
mendozer
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Default is it my freezer or thermostat?

recently my keezer hasn't been cold. I have a thermometer at my collar which shows 60. Typically it shows 45 and my thermostat bulb is at the bottom set to 38-40. I can hear the compressor running though.

is there a way to test if my thermostat is malfunctioning? It is in a vial with water as well, so it's not set up improperly.

I would really HATE to have my freezer be pooping out on me after all the hard work i put in.

thanks


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Old 04-07-2013, 09:21 PM   #2
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I switched the freezer's plug from the johnson controls plug to a regular outlet. It's been working the whole time since then, about 4 hours. It's still in the low 50s in there, with 48 on the lower inside wall being the coldest. How much longer should I see results in?

Any people in the trade know how much it costs to pump some more freon in there?


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Old 04-07-2013, 10:57 PM   #3
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Depending on the type of freon and the company you call out, it may be more cost effective to look at a newer unit. Lowes/Home Depot deep freeze type units. What you describe definitely sounds like a refrigerant problem. Service call $85 - $100, then refrigerant charging $50 -$150 depending on type and company.
Do you have any friends that are in the HVACR business?
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Old 04-08-2013, 03:09 AM   #4
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Here is an easy thing to try. Unplug the keezer for a minimum of 24 hours, 48 is better. Then plug it back in and try again.
Some (most) freezers with a compressor will go into a defrost cycle a few times a day to eliminate build up of frost on the evaporator coils. If the defrost cycle isn't working the freezer will not cool properly do to ice build up on the coils.
When you plug the unit back in check the temperature after a few hours and if all is well the problem is the defrost circuit/system. (The problem will reoccur
over time)
You can also check to make sure the gasket on the lid is sealing well and that the condenser coils are clean.

Hope this helps, good luck
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Old 04-08-2013, 04:14 AM   #5
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i cleaned off the condenser coils a bit today. I'll try that unplug resetting method
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Old 04-08-2013, 03:08 PM   #6
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Quote:
Originally Posted by mendozer View Post
i cleaned off the condenser coils a bit today. I'll try that unplug resetting method
Just to be clear you are not resetting anything by unplugging the unit, what it does is to allow the the evaporator coils to de-ice.

If it works OK for awhile after being plugged back in and then starts to fail again, you can be fairly confident that the freon level is ok and that the problem is in the defrost circuit. More on that after later
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Old 04-08-2013, 11:55 PM   #7
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is it a cyclical thing? i haven't had any issues since last March when I got it. If it's a once yearly unplugging, I'm ok with that
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Old 04-09-2013, 12:10 AM   #8
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Quote:
Originally Posted by Wobbly View Post
[...]If it works OK for awhile after being plugged back in and then starts to fail again, you can be fairly confident that the freon level is ok and that the problem is in the defrost circuit. More on that after later
Chest freezers have defrost circuits?

Cheers!
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Old 04-09-2013, 03:40 PM   #9
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Quote:
Originally Posted by day_trippr View Post
Chest freezers have defrost circuits?

Cheers!
No I think most if not all do not, I was thinking more of a refrigerator when I first replied, but that being said if the evap. coils are iced up, defrosting the unit will help.
Definitely worth trying before spending money to repair the unit.
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Old 04-11-2013, 03:55 AM   #10
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ok i did the 48 hour rest. I plugged it in for 4 hours directly to outlet and it got reasonably cold, but not freezing. Then i unplugged it and switched it to the thermostat. The compressor didn't run, indicating that it was at 38d, which it certainly didn't feel like.
Now a day later, my beer is pouring out at 53d. uck!

So maybe it's low on freon?


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