Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 20-04-2019, 05:00   #1
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Freezer Too Warm

I have a spillover system with a fan and return hole between the larger freezer and the "refrigerator" side. The past week the refrigerator side has been too warm, which of course means the freezer isn't cold enough. The refrigerator side has been getting into the low 40s where it used to stay pretty much around 35-38. Normally this is a sign that the freezer needs defrosting.

I normally have to defrost every 7-10 days if we have been on the boat full time. The other day the temperatures were too warm and I defrosted again after only 3 days even though the ice layer didn't seem all that thick. Normally the refrigerator side temp would return to the 35-38 range shortly after a defrosting. But it isn't really cooling down and this morning was 38.5 when I got up.

I got a thermometer for the freezer as the frig side has a digital controller for the fan with read out. I used to be able to get the freezer down to 17F, but now it doesn't want to go below 25F.

Things I've tried/checked:
- I redid the seals as the frost of course is an air issue
- I checked the spillover fan operation and it's working
- I cleaned the evaporator (it was pretty dirty even though I have a filter in front of it). This made a big difference in air flow through the condenser and across the compressor, but didn't seem to do anything far as freezer temp.
- I considered that it was just a lot warmer out. But when I closed up the boat and ran the air conditioning it didn't affect the freezer temp.
- the evaporator plate gets fully frost covered
- the compressor appears to be running at full speed and is drawing about 5 amps (BD50 system)

I've only had the digital read out on the refrigerator side for about 6 months. So it has mainly been running in cooler weather till recent so maybe my system has always had these temperatures. But that in my mind doesn't explain why the freezer could get down to 17 a week ago, but only 25 now.

Could it be that the pressure got high last week at the 17 degrees and dirty condenser and leaked some refrigerant?
__________________

sailorboy1 is offline   Reply With Quote
Old 20-04-2019, 08:00   #2
Marine Service Provider

Join Date: Aug 2004
Location: Ft. Lauderdale
Posts: 1,424
Re: Freezer Too Warm

Quote:
Originally Posted by sailorboy1 View Post
I have a spillover system with a fan and return hole between the larger freezer and the "refrigerator" side. The past week the refrigerator side has been too warm, which of course means the freezer isn't cold enough. The refrigerator side has been getting into the low 40s where it used to stay pretty much around 35-38. Normally this is a sign that the freezer needs defrosting.

I normally have to defrost every 7-10 days if we have been on the boat full time. The other day the temperatures were too warm and I defrosted again after only 3 days even though the ice layer didn't seem all that thick. Normally the refrigerator side temp would return to the 35-38 range shortly after a defrosting. But it isn't really cooling down and this morning was 38.5 when I got up.

I got a thermometer for the freezer as the frig side has a digital controller for the fan with read out. I used to be able to get the freezer down to 17F, but now it doesn't want to go below 25F.

Things I've tried/checked:
- I redid the seals as the frost of course is an air issue
- I checked the spillover fan operation and it's working
- I cleaned the evaporator (it was pretty dirty even though I have a filter in front of it). This made a big difference in air flow through the condenser and across the compressor, but didn't seem to do anything far as freezer temp.
- I considered that it was just a lot warmer out. But when I closed up the boat and ran the air conditioning it didn't affect the freezer temp.
- the evaporator plate gets fully frost covered
- the compressor appears to be running at full speed and is drawing about 5 amps (BD50 system)

I've only had the digital read out on the refrigerator side for about 6 months. So it has mainly been running in cooler weather till recent so maybe my system has always had these temperatures. But that in my mind doesn't explain why the freezer could get down to 17 a week ago, but only 25 now.

Could it be that the pressure got high last week at the 17 degrees and dirty condenser and leaked some refrigerant?
The freezer temperature is controlled by the thermostat running or not running compressor. Frost on evaporator or leaking insulation does not alter the freezer thermostatís ability to maintain freezer preset temperature as long as compressor does cycle off.
Refrigerator temperature is directly related of spillover from freezer area normally 20 degrees warmer than freezer temperatures
You report - the compressor appears to be running at full speed and is drawing about 5 amps (BD50 system) Full speed of a BD50 compressor amperage would be more like 6.5 amps if it were trying to reach freezer temperatures. A BD35 at Ĺ max speed might draw 5 amps.Your reporting that evaporator is covered over with frost would rule out low on refrigerant.

How many minutes during a complete cycle does compressor run?
It always helps to know the manufacturer of your refrigeration system when questioning performance.
__________________

Richard Kollmann is offline   Reply With Quote
Old 20-04-2019, 08:02   #3
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Re: Freezer Too Warm

never mind it seems to have "fixed" itself

while I'm happy the PFM bugs me, but I know how to handle that
sailorboy1 is offline   Reply With Quote
Old 20-04-2019, 08:24   #4
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 30,118
Re: Freezer Too Warm

Quote:
Originally Posted by sailorboy1 View Post
never mind it seems to have "fixed" itself


Itís likely that cleaning the condenser ďfixedĒ it, but due to hysteresis it took time for it to cool down.
Most of us have fridge systems that just barely get by, so any change, like adding a lot of food may take more than a day to return to set temp.
a64pilot is online now   Reply With Quote
Old 20-04-2019, 09:05   #5
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Re: Freezer Too Warm

Took all that into consideration as I waited 3 days before finally posting the thread. I also researched everything before hand. Temperatures hadn’t changed for 10 hours and then PFM happened and all became good.

It’s 35.1 in the frig right now at noon. In 0.1 the fan will even turn off. I’m sitting here almost watching for it :-)
sailorboy1 is offline   Reply With Quote
Old 20-04-2019, 09:07   #6
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Re: Freezer Too Warm

I heard a ďclickĒ and turned around and the spillover fan had cycled off
sailorboy1 is offline   Reply With Quote
Old 20-04-2019, 15:26   #7
Registered User

Join Date: Apr 2014
Boat: Moody 425
Posts: 300
Re: Freezer Too Warm

Funny you brought this up. We were anchored near you a few weeks ago. That's around when I started having problems with temps in the boxes.

My freezer plate has been frosting up way faster and with more frost than normal. Using an IR thermometer I was getting around 0 to 10 F on the plate. After I scrape the frost off the plate it's -10 to -15F! The frost was thick enough to act as insulation. And since then I've been scraping every day.

I attribute my issue to worn out gaskets on the lids (along with a bad design) and also possibly the weather. After getting confirmation from Rich at Cool Blue I got new gaskets. Also found out the old insulation where the plumbing for the plate goes into the box was deteriorating.

I think a biggest part of the equation has been the weather plus the gaskets. It's been extremely humid in S FL. We're in Key West and it's been like this since North Palm Beach.

When I get back up north I'm going to look into getting someone to help with the lid design and get it right.
Sailing Drummer is offline   Reply With Quote
Old 20-04-2019, 15:33   #8
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Re: Freezer Too Warm

Well I’m just up in Marathon so maybe it really is just the weather.

Meanwhile today the refrigerator side has been 35-36 all day (I changed control from 35-38 to 35-36) after I started this.
sailorboy1 is offline   Reply With Quote
Old 20-04-2019, 15:37   #9
Registered User

Join Date: Oct 2015
Posts: 2,008
Re: Freezer Too Warm

Quote:
Originally Posted by sailorboy1 View Post

I normally have to defrost every 7-10 days if we have been on the boat full time.
Aside from ANYTHING else, if you need to defrost your unit every week, you have a SERIOUS air leak into your box.

Start with the door gasket, and be sure that it is good because that is the cause 98% of the time. If you are SURE that is good, look for leaks where the tubing and wires penetrate the box.
billknny is offline   Reply With Quote
Old 20-04-2019, 17:02   #10
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 30,118
Re: Freezer Too Warm

If you have an ice box conversion another place that the humid air can be coming from is the drain. I put a rubber plug in my drain to help stop it.
I want to keep the drain, cause it makes defrosting so much easier.
a64pilot is online now   Reply With Quote
Old 20-04-2019, 17:11   #11
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Re: Freezer Too Warm

There’s a plug in my drain

And other than that I’m just going to let it all roll past me
sailorboy1 is offline   Reply With Quote
Old 09-07-2019, 05:53   #12
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Re: Freezer Too Warm

Last month in Sarasota out on a mooring I was having to defrost the freezer every 3 days. Now in Carrabelle in a slip with the air conditioning running I'm defrosting normal time frame of 7-10 days. So the humidity in the boat air is I believe the big factor.
sailorboy1 is offline   Reply With Quote
Old 09-07-2019, 07:47   #13
Marine Service Provider

Join Date: Aug 2004
Location: Ft. Lauderdale
Posts: 1,424
Re: Freezer Too Warm

Quote:
Originally Posted by sailorboy1 View Post
Last month in Sarasota out on a mooring I was having to defrost the freezer every 3 days. Now in Carrabelle in a slip with the air conditioning running I'm defrosting normal time frame of 7-10 days. So the humidity in the boat air is I believe the big factor.
Moist air infiltration that generates frost in box is always a problem on boat's refrigerator but there are ways to control it:

There needs to be a switch outside box to stop all fans in box before opening lid.

The door or lid seal needs to be the type that is compressed to sealed all the way around opening and tested with the friction of pulling a ribbon through seal.

Small Zip lock bags filled half way with shipping peanuts taking up air space between product in box and lid will reduce frost build up. You can easily move these small pillows out of the way to remove items under neath.
Richard Kollmann is offline   Reply With Quote
Old 09-07-2019, 09:03   #14
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 30,118
Freezer Too Warm

We should defrost at lest once a month but often donít, Iíll admit that often I defrost when I notice freezer temps increasing as our system maintains plate temp, and not box temp so as the insulating ice builds up, box temps goes up.

Iím sure your right about the air conditioning reducing how often defrost if required, never thought about it, but itís certainly logical.
a64pilot is online now   Reply With Quote
Old 09-07-2019, 10:07   #15
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Re: Freezer Too Warm

Quote:
Originally Posted by Richard Kollmann View Post
Moist air infiltration that generates frost in box is always a problem on boat's refrigerator but there are ways to control it:

There needs to be a switch outside box to stop all fans in box before opening lid.

The door or lid seal needs to be the type that is compressed to sealed all the way around opening and tested with the friction of pulling a ribbon through seal.

Small Zip lock bags filled half way with shipping peanuts taking up air space between product in box and lid will reduce frost build up. You can easily move these small pillows out of the way to remove items under neath.
Thanks

1 week seems average for liveaboard on my boat model based on a survey. I'm OK with that as it only takes about 10 minutes and most of that time is taking stuff out of the freezer first.
__________________

sailorboy1 is offline   Reply With Quote
Reply

Tags
freezer

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Too Close! WAY TOO CLOSE! Anchoring Near Jerks MarkJ Anchoring & Mooring 111 13-09-2018 03:59
Too Much Boat Too Soon? SV Bacchus General Sailing Forum 52 09-03-2018 03:48
Has Cruising Become Too Artificial, Too Expensive, Too Regulated ? Piney Our Community 66 26-07-2017 19:01
Freezer not a real freezer Drift Woods Provisioning: Food & Drink 21 15-03-2016 13:06
Too much of a good thing! Too many buyers for one boat. appick Monohull Sailboats 28 16-01-2015 15:51

Advertise Here


All times are GMT -7. The time now is 11:42.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.