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Post by jeffjo on Mar 31, 2019 19:58:36 GMT
Hi,
I have a DR series Monitor Top that has been working faithfully for years.
the only work I've done is to replace the door gasket, sourced from the late Mike Arnold.
Lately the fridge will intermittently keep running, and freeze the food.
I'm wondering if this is a lubrication issue in the controller - a CR 1050 D-1, or if it means that the springs need to be replaced?
I have seen the contacts arc when it kicks on.
Any advice appreciated!
Jeff
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Post by Travis on Mar 31, 2019 20:46:49 GMT
It’s likely a lubrication issue. I would partially disassemble the control and clean it, mainly the movable part of the main contact.
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Post by turbokinetic on Apr 1, 2019 1:39:53 GMT
Hi, I have a DR series Monitor Top that has been working faithfully for years. the only work I've done is to replace the door gasket, sourced from the late Mike Arnold. Lately the fridge will intermittently keep running, and freeze the food. I'm wondering if this is a lubrication issue in the controller - a CR 1050 D-1, or if it means that the springs need to be replaced? I have seen the contacts arc when it kicks on. Any advice appreciated! Jeff Hi Jeff. The thermostat control depends on balancing the force of a spring with the pressure of a gas in the bellows. This involves a small amount of force and if anything gets tight, gummed, or corroded then things will stop working. It is often the fix just to add a drop of chain and cable lubricant to the pivot points. This is a thick, tacky oil which will stay put in the joint and allow free movement of the parts.
Which type of evaporator does your DR have? Can you post a picture of the evaporator and the thermostatic sensing tube? It is much less likely; but if the evaporator is not frosting evenly it can allow the control sensing tube to be on a non-frosted area and cause it to misoperate.
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Post by jeffjo on Apr 2, 2019 2:06:39 GMT
Here’s a picture of my control- I think the evap is frosting fairly evenly. I would like to clean a seal the rust spots. What at do you think ? Jeff Attachments:
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Post by birkie on Apr 2, 2019 2:24:06 GMT
Looks normal to me. Ideally, some lubrication will help. My DR1 control was unusable when I got it. I just sprayed the movable parts with LPS-1 (a non-oily lubricant for electrical contacts) and it became buttery smooth
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Post by turbokinetic on Apr 2, 2019 12:00:21 GMT
Here is a picture of a really cruddy control. The three arrows show the main pivot points in the control which allow it to work automatically.
The center post in particular has multiple levers which pivot around it. All of the different levers which are supported by this post must move freely. After unplugging the power, look very closely at the control, and use a straw-type applicator to lubricate each of the individual pivots around this lever. Gently manually move each of them and ensure they are free to operate.
Place the control in the ON position and lubricate it while moving the parts. Then again place the control in OFF position and lubricate it. Check it out in all modes of operation. It should work fine afterwards!
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