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  1. Replies
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    If the evap isn’t picking up much heat a 30*...

    If the evap isn’t picking up much heat a 30* condenser TD is probably high. What was the SH and SC?
  2. You’re right, it shows -oL

    You’re right, it shows -oL
  3. Two different places is sufficient. Wrong...

    Two different places is sufficient. Wrong refrigerant will also do it. And of course an instrument fault is always possible. We’re talking about a reading on an instrument(s) not an actual physical...
  4. Probably got your clamps on the wrong lines.

    Probably got your clamps on the wrong lines.
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    It eliminates a lot of aggravation. I love that...

    It eliminates a lot of aggravation. I love that setup. I purchased an OEM rubber hard case for my DMM that had a compartment for the clamp. They’re always together. Only takes a moment to plug it...
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    I did !!! Lol. :yes: I didn't know that about...

    I did !!! Lol.
    :yes:

    I didn't know that about the i200 when I bought it, wasn't planning on measuring tenths of an amp with it. Nice to know it does though. I have used it many times for CCHs and...
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    A few reasons I got the i200 rather than the...

    A few reasons I got the i200 rather than the i200s. Firstly there was the cost. The i200 is much cheaper than the i200s. Secondly was the actual reading. The i200 reading requires no conversion. The...
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    According to the sales literature yes, but in...

    According to the sales literature yes, but in practice this isn’t true. I have had the i200 for several years.
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    Those are code for “buy a different gauge”

    Those are code for “buy a different gauge”
  10. The instructions are to reset the unit. If the...

    The instructions are to reset the unit. If the fault doesn’t clear replace the board. It is implied that if the fault does clear then don’t replace it.

    Code 8 can be triggered by power...
  11. I just threw 10 of them away. I’m guessing they...

    I just threw 10 of them away. I’m guessing they were about 25 years old
  12. Thread: 87v???

    by hvacrmedic
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    736

    It’s probably mine, lol, stolen from me. Loved my...

    It’s probably mine, lol, stolen from me. Loved my 87V, will probably get another before I retire.
  13. I've had the Amprobe for many years. Still works,...

    I've had the Amprobe for many years. Still works, when I bang it on my knee. I can't speak about any others, its the only one I've ever used, but it does work. Best to use a good set of noise...
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    I thought you were replying to me. You’re...

    I thought you were replying to me. You’re correct, they are not the same thing. Also inrush has more than one interpretation, depending upon context. That being said, do you think the OP was...
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    Geez.

    Geez.
  16. Replies
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    It’s “locked rotor” amps. It very definitely does...

    It’s “locked rotor” amps. It very definitely does apply to a bound compressor. Much higher than LRA indicates a turn to turn short.
  17. There is no such thing as max discharge pressure,...

    There is no such thing as max discharge pressure, unless you’re tripping out on high pressure. Max would be whatever the safety is set for.
  18. Replies
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    Superstition isn't a valid approach to service...

    Superstition isn't a valid approach to service work.
  19. I suspect that you’re suspecting too much!...

    I suspect that you’re suspecting too much! :bump:He said he checked it. First post.
    He also said TD was at max, which is a nonsense charging method from 40 years ago.
  20. On a TXV system the charge is generally adjusted...

    On a TXV system the charge is generally adjusted to achieve proper subcooling, not by condenser TD. Just forget the condenser TD and get the unit charged. Condenser TD is not a constant. Don't treat...
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    The video is pure BS. The minimum micron level...

    The video is pure BS. The minimum micron level has nothing to do with hose size per se. In fact given similar construction the larger surface area of the larger hoses would allow a higher rate of...
  22. Good to know. Thanks.

    Good to know. Thanks.
  23. The Infinity t-stat does not have an occupancy...

    The Infinity t-stat does not have an occupancy sensor.
  24. Analog Gas pressure test kit. The tubing is...

    Analog Gas pressure test kit. The tubing is probably dry rotted by now.
  25. Replies
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    I posted a reply and it was removed. Whoever...

    I posted a reply and it was removed. Whoever moderates that site is as stupid as that professor.
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    He should seek a refund from whoever gave him...

    He should seek a refund from whoever gave him that PhD, it's worthless.
  27. Replies
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    I was referring to calibration of your scale.

    I was referring to calibration of your scale.
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    High SC does tell you refrigerant is backed up,...

    High SC does tell you refrigerant is backed up, but more importantly it tells you that the amount of refrigerant backed up is higher than normal. IOW there is excess refrigerant in the coil. The...
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    If the TXV was restricted you would have had a...

    If the TXV was restricted you would have had a lot more than 8° SH. You wasted your time playing with the bulb. Look for an overcharge or an indoor airflow issue. The gradual rise in HP usually...
  30. The Bristol 2-speed was/is in the 25HNA6. So yes,...

    The Bristol 2-speed was/is in the 25HNA6. So yes, yours has a start relay whose coil connects directly to the circuit board. You cannot start the compressor by pushing in the contactor. It might...
  31. The Bristol 2-speed was/is in the 25HNA6. So yes,...

    The Bristol 2-speed was/is in the 25HNA6. So yes, yours has a start relay whose coil connects directly to the circuit board. You cannot start the compressor by pushing in the contactor. It might...
  32. Correction, some use the board-controlled start...

    Correction, some use the board-controlled start relay. Some use a standard start relay. *Just looked it up, your unit uses a standard start relay. Either way I suggest a second opinion. If the start...
  33. Ok, you had a first tech who misdiagnosed a bad...

    Ok, you had a first tech who misdiagnosed a bad board that was simply doing its job, spawning a fault code 73. Then a second tech diagnosed a bad commutator which means that he didn't know what he...
  34. Yes, I just explained it to you. Or are you...

    Yes, I just explained it to you. Or are you asking if you can control the fan with a programmable t-stat? That would depend upon the model of the t-stat. You cannot configure a program mode with the...
  35. SW3 is the fan speed selection for cooling and...

    SW3 is the fan speed selection for cooling and continous fan. Must match the condenser size. Continuous fan operation is selected on the tstat using the fan switch. You can change the continuous fan...
  36. That's normal. The secondary voltage will drop...

    That's normal. The secondary voltage will drop when the control circuit is loaded. In order to maintain 24 volts under load the no-load output is designed to be a bit higher. Assume 15%. 24 volts...
  37. There’s nothing impossible about any valid codes....

    There’s nothing impossible about any valid codes. Maybe it was impossible for the tech to properly diagnose it. Code 73 is either stuck/welded contactor points or a miswired unit. Since the breaker...
  38. Typical HSPF is around 8, which translates to a...

    Typical HSPF is around 8, which translates to a COP of 2.34, or just over twice as much heat for the same dollar. That's a far cry from 7 times. Now I know why HO's freak out when you tell them to...
  39. They're not needed above 45°. The heat pump...

    They're not needed above 45°. The heat pump should be able to satisfy the demand without them at that outdoor temperature. The idea is that you'll use less energy with them disabled until actually...
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    At 0.5" TESP (static) on low speed your temp rise...

    At 0.5" TESP (static) on low speed your temp rise would only be about 50°. On medium speed the temp rise would be even lower. So your 60° deltaT on medium speed is well above normal for this furnace....
  41. No no no, you got it all wrong, I was just giving...

    No no no, you got it all wrong, I was just giving you a couple to get it started.
  42. DILLIGAF? DYOH. :grin2:

    DILLIGAF? DYOH. :grin2:
  43. Replies
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    Well I spoke too soon. Had this been the E3A all...

    Well I spoke too soon. Had this been the E3A all would have been well. But with the E4A the data given by the OP doesn't line up with the unit performance data at all. The OP's performance appears to...
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    And if we had the blower performance chart we’d...

    And if we had the blower performance chart we’d probably find that the TESP is acceptable.
  45. Replies
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    With a higher cfm the deltaT is lower, but the...

    With a higher cfm the deltaT is lower, but the delivered output is not lower. Heat and temperature are not the same thing. A glass of ice water has much more heat than a drop of boiling water. Though...
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    Based upon what you've said I think it's likely...

    Based upon what you've said I think it's likely that the second coil isn't leaking, and maybe not the first either. If the leak was somewhere else and a coil was replaced, then the leak still exists,...
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    Can you explain how you arrived at that...

    Can you explain how you arrived at that conclusion?
  48. Replies
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    Do you feel entitled?

    Do you feel entitled?
  49. Thread: FLIR CM44

    by hvacrmedic
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    3,377

    It has a low pass filter. Different animal. The...

    It has a low pass filter. Different animal. The Flir has both.
  50. Thread: FLIR CM44

    by hvacrmedic
    Replies
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    3,377

    Ok, given a choice, I’d go with Fluke. You get...

    Ok, given a choice, I’d go with Fluke. You get what you pay for. That being said, the Flir is definitely ok, but it has some negatives that deserve consideration before buying, and I knew about...
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