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Whirlpool acronym


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6 replies to this topic

#1 jeff lee

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Posted 29 October 2011 - 06:20 PM

Can anyone tell me what the " PTC" acronym stands for when referencing a compressor relay on a Whirlpool fridge?
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Thanks in advance !

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#2 RegUS_PatOff

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Posted 29 October 2011 - 06:49 PM

Positive Temperature Coefficient
usually refers to resistors that increase in resistance with temperature
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#3 Rocket Man

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Posted 29 October 2011 - 06:52 PM

Positve Temperature Coeffecient (PTC). The higher the temperature, the more resistance. Usually used in Compressor circuits, to lessen the current flowing through one of the windings as it runs.

#4 jeff lee

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Posted 29 October 2011 - 07:09 PM

Thanks to both of you..
Please excuse my ignorance, but why would you want to reduce amperage to the comp. as temperature rises?
:woot:

Excuse me again guys I Wiki'd it, am attempting to absorb the info there !

#5 kdog

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Posted 29 October 2011 - 07:42 PM

Used to energize start winding during start up, as the compressor gets uo to speed, the occuring heat generated by flowingcurrent through the PTC, causes the conductor to become a resistor - thereby removing the start winding from the circuit. Manufacturers use them as compressor starters because their production (including replacement sales) is cheaper than alternative starter technologies.
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#6 KurtiusInterupptus

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Posted 29 October 2011 - 07:45 PM

The ptc relay aids In arc suppression at point of contact...limits on rush amperage to slow the inevitable degradation of contact points....
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#7 kdog

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Posted 29 October 2011 - 07:50 PM

" PTC" compressor relay on a Whirlpool fridge?


Some common examples:

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This is what a NON-PTC starter looks like:

00991034.jpg


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Recent blog entries on this topic

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What are PTC compressor start relays?

By Samurai Appliance Repair Man in Samurai Appliance Repair Man's Blog, on 29 October 2011 - 08:43 PM

PTC stands for Positive Temperature Coefficient. This refers to the silicon guts inside the relay whose resistance increases as its temperature rises. When the compressor first starts up, the resistance of the PTC stuff is very low and it lets current flow into the start winding of the compressor. As the current flows thru the PTC, it heats it up and also...

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