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Re: Heat Pump temperature drop
You guys who are using, backing, and supporting the use of TD for assessing the condition or general condition of a/c systems really need to get your heads out of your butts. I hate to be that blunt, but nothing else it getting your attention.
I will repeat what I have stated here many times before:
Let's say you measure a TD of 18 degrees F, really pretty good, huh? So you write that down and go on about your merry way.
You get a call from your client a month later and you to pay for repairs to their system, which they had cleaned at your advice, and the HVAC guy found several things wrong that your client now expects you to pay for.
You respond "It was working fine what I inspected it, the TD was 18 degrees."
You client responds "Yes, the TD was 18 degrees, but the supply duct was mostly crushed, which you DID NOT report, and when my a/c guy fixed that the TD dropped to 10 degrees because now full air was flowing over the coil, so he went out and checked the unit, finding it low on refrigerant, and ... "
Keep checking TD because that is what the HI schools say to do, because it is quick and easy. Just be aware that your TD taking has no bearing on how the unit is working or its condition and will be of no use when you try to support your report's statement that it was 'functioning properly'.
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