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  1. Replies
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    Outdoor heat pump stat setting?

    Hi,

    What should the outdoor thermostat on a heat pump system be set to to switch over to electric heat? -12, -15, -20c, etc..
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    Just to update, it did turn out to be the...

    Just to update, it did turn out to be the reversing valve. The tech was able to get the system running in cooling mode, but it wouldn't switch over to heating. Compressor, boards, etc., were fine -...
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    Yeah, so I hear! At least it is in the indoor...

    Yeah, so I hear! At least it is in the indoor compressor box - so they could take the side-panels off or even unhook the refrig lines and move the whole box out to work on it. That should at least...
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    I was under the impression, that if there was a...

    I was under the impression, that if there was a leak, the low pres cut-off would have shut everything down before the fusible plug got hot enough to blow.

    The lit for the 38SQ says it has...
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    The blower is original, but we've oiled it over...

    The blower is original, but we've oiled it over the years and its going as we speak (no strange noises, vibrations, squirel cage keeps spining for 50-60 seconds after it's shut down).

    I'm going to...
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    A new Comfort series system will cost about 7...

    A new Comfort series system will cost about 7 times what a reasonable estimate for replacement of the reversing valve (inc. new dryers, fuse, charge and labour); so cost effectiveness is relative.
    ...
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    1,940

    What does your intuition say? The tech who...

    What does your intuition say?

    The tech who visited here had no idea and didn't seem interested in finding out. He just told us a salesman would come by tomorrow morning...
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    On this point, I must disagree. As to the second...

    On this point, I must disagree. As to the second opinion, well, that is a given!
  9. Replies
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    I hear a click as in something moving around in...

    I hear a click as in something moving around in the R valve body and maybe hitting the end of the horizontal tube.

    If I have the tech come back, would he be able to check if its working properly...
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    This is usually caused by what? Is the reversing...

    This is usually caused by what? Is the reversing valve finished for good? I was able to energize and de-energize it and did hear a loud clicking - which would indicate (I assume) at least some...
  11. Replies
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    1,940

    It was a loud humming - unusually so. Even with...

    It was a loud humming - unusually so. Even with the other AH running, we could hear it.
  12. Replies
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    1,940

    Jammed reversing valve?

    Heat pump quit heating in late winter - has sat unused since. Technician attended a few days ago and discovered that the unit has no charge and that it had been released through the "safety plug",...
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    Here you go.

    Here you go.
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    933

    Here you go!

    Here you go!
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    It's actually about 9.5 SEER But, yes, I think...

    It's actually about 9.5 SEER

    But, yes, I think I'll most likely replace it.

    (I forgot to add that we did change-out all the contactors (three per system, I think) a few years back.)
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    We have two Weathermaster III units from around...

    We have two Weathermaster III units from around 1988. Repair history between the both of them is limited to a new AH blower motor, a condenser fan motor and a couple of thermistor's for the defrost...
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    Oh dear, it's looking more and more like a total...

    Oh dear, it's looking more and more like a total change out...

    The technician attended a few days ago, and after he left I happend to notice an unusual humming coming from the compressor box. It...
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    The heat sensitive "safety plug" on this system...

    The heat sensitive "safety plug" on this system has blown - so there is no charge currently. Probably due to my over- zealous use of insulation on some of the refig lines (now removed..) in the...
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    Thanks. Consider it done!

    Thanks. Consider it done!
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    Actually, the compressor and reversing valve are...

    Actually, the compressor and reversing valve are inside. The condenser has only a fan, thermistor and thermostat.

    If we can fix it relatively easily and inexpensively, then we'll probably do so....
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    Close up of the part.

    Close up of the part.
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    Rusting liquid line dryer - Replace?

    Original liquid line dryer - right side one beginning to show signs of rust around the connections and slight rust spotting on the body. We're having work done anyway, so should we ask him to just...
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    Is it possible to test for a leak without...

    Is it possible to test for a leak without introducing a full 9 lbs. + charge and waiting around to see if it leaks out (and from where)? Is it possible to use an inert gas like Nitrogen?

    Normally,...
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    No one is even going to tell me I'm an idiot!? ...

    No one is even going to tell me I'm an idiot!? Oh, how disappointing! :eek:
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    Over heat/pressure fuse blown

    One of two Carrier 38SQ units quit suddenly late this past winter. A technician attended today and indicates the unit has no charge and the temperature/pressure sensitive fuse on the vapour line had...
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