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Old 10-02-2024, 09:08 PM   #1
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Dometic Fridge Temperature Question

The refrigerator section of my 2008 626A Dometic fridge never gets below 50 degree anymore (sometimes not below 55, even when it's cool outside). I checked the thermistor on the clip in the fridge (it's moved to the highest position on the fins), and it reads about 2K ohms at room temp, and about 8K ohms when placed in a cup of ice water, so that seems fine. Does this thermostat actuate separate coils in the fridge section, or does it just turn off the heating element, whether gas, 12V, or 120VAC? The freezer section works just fine, but I would like the fridge section to get to at least less than 40 degrees, or my food will not last as long. I am technically savvy, but can't find any in-depth info on this. I check the seals around my fridge door, and they seem fine. I just want to know if there are separate actuators, or relays that operate the freezer section different than the fridge section. Or is the whole thing just a simple ON/OFF switch for the main heating element? Thanks!
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Old 10-02-2024, 09:34 PM   #2
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Simple On/Off

Thermistor senses fin temp in food compartment and in causes cooling cycles to control temp in food compartment

Freezer is 1st in line of cooling process so it stays cold even when food compartment doesn't

Could be bad thermistor
Could be drip tray drain tube has deteriorated/cracked and allowing warm air into food compartment
Could be circuit board
Could be obstruction/blockage between freezer and food compartment ---cooling unit issue

You could unplug the thermistor (leads on lower circuit board P2) and run fridge w/o it for 12 hrs and check food compartment temp

Dometic doesn't have a 626A Model
Check the model number and post again for more specific information
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Old 10-03-2024, 05:59 PM   #3
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Originally Posted by Old-Biscuit View Post
Simple On/Off

Thermistor senses fin temp in food compartment and in causes cooling cycles to control temp in food compartment

Freezer is 1st in line of cooling process so it stays cold even when food compartment doesn't

Could be bad thermistor
Could be drip tray drain tube has deteriorated/cracked and allowing warm air into food compartment
Could be circuit board
Could be obstruction/blockage between freezer and food compartment ---cooling unit issue

You could unplug the thermistor (leads on lower circuit board P2) and run fridge w/o it for 12 hrs and check food compartment temp

Dometic doesn't have a 626A Model
Check the model number and post again for more specific information

Sorry, the model is DM2652, from 2008. It's been running for almost 24 hours now, and the fridge is still 80+ degrees F, while the freezer section is nice and frozen. It's about 100 degrees outside now. I live in Phoenix, AZ. Why won't the fins in the fridge section get cold? Thanks!
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Old 10-03-2024, 06:58 PM   #4
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Originally Posted by StacAZ View Post
Sorry, the model is DM2652, from 2008. It's been running for almost 24 hours now, and the fridge is still 80+ degrees F, while the freezer section is nice and frozen. It's about 100 degrees outside now. I live in Phoenix, AZ. Why won't the fins in the fridge section get cold? Thanks!
Did you check everything Old Biscuit recommended? I have a 2010 DM2652, and when it wasn't cooling well I found the drip tray tube had disintegrated up by the nipple on the back, and hot air was getting in. Open the outside access and follow the corrugated plastic tube up and see if it's fully intact. If it's not that, then check the other things.
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