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Heat Pump Runs Hot & Cold

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Tim
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Platinum
Re: Heat pump
Tim   4/30/2012 8:58:03 PM
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My broken wire was straight from the control wiring to the control board.  It was just long enough to reach the board.  With the break, the technician added a pig-tail to make the wire long enough.

William K.
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Platinum
Heat pumps and quality of construction.
William K.   5/5/2012 9:28:04 PM
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Poorly crimped wires can certainly cause a whole lot of failures, mostly at the wrong times, like in winter, for heat pumps. The shuttle valves fail because they are of a quality not quite good enough for the job. In many circles that is called "value engineering."

One alternative choice would be to have manually operated valves to go from cooling to heating. Thgat would be much less convenient but it would be far more reliable. Of course, a large portion of our population would be unable to understand how to make the change over. 

Contactors, as opposed to relays, most often have contacts that are double makeand hence double break. This gives twice the open contact gap for no extra cost, and in addition, the contacts are usually heavier material to better handle the higher load current with les heating. Also, contactors do not use flexing wire in the current path.

Tool_maker
User Rank
Platinum
Re: Relay vs. Contactor
Tool_maker   5/14/2012 1:13:01 PM
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Today it is never safe to assume that an item needs replacement just because the srvice technician who makes the call does not know how to make the item work.

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