HVAC Community Hub | Jack | Activity https://hvachub.co/members/jkrabinson/activity/ Activity feed for Jack. Wed, 29 Apr 2026 12:59:07 +1200 https://buddypress.org/?v=2.18.0 en-US 30 hourly 2 4dd2731eec7da5d1cddec8b56ff94f3d Jack posted a new activity comment https://hvachub.co/news-feed/p/6568/#acomment-6606 Mon, 13 Apr 2026 21:25:46 +1200 Moisture on the coil from low airflow can start icing it slightly then your readings get even more misleading.

In reply to - Dylan posted an update in the group Troubleshooting & Repairs Ran into a system today where suction pressure looked low so it seemed like a charge issue at first, but after checking a bit more it turned out to […] ]]> 13c6346e50cd8fc1c594729e20300566 Jack posted a new activity comment https://hvachub.co/news-feed/p/6583/#acomment-6588 Sun, 12 Apr 2026 02:53:21 +1200 Most of our callbacks were wiring or airflow checks getting skipped.

In reply to - Samuel posted an update in the group HVAC Installation Best Practices Callbacks are killing time over small misses lately. Anyone else dealing with this? ]]> 5f25db2b068c3fc65c0ca428b17a6e9f Jack posted a new activity comment https://hvachub.co/news-feed/p/6570/#acomment-6581 Sat, 11 Apr 2026 21:56:40 +1200 Mainly liability right now maybe expanding later.

In reply to - Jack posted an update in the group HVAC Installation Best Practices Been reviewing our business insurance lately and realizing I probably don’t understand half of what we’re actually covered for. Feels like […] ]]> dedbe2f2961cad281e7a8530a12bfa7b Jack posted an update in the group HVAC Installation Best Practices: Been reviewing our business insurance lately and realizing […] https://hvachub.co/news-feed/p/6570/ Sat, 11 Apr 2026 09:30:00 +1200 Been reviewing our business insurance lately and realizing I probably don’t understand half of what we’re actually covered for. Feels like every policy looks the same until you actually need it. Curious if anyone here has a setup they feel confident about or something they learned the hard way.

]]> 11 d0ff99be5985f103bd1cac5db2070e3c Jack posted a new activity comment https://hvachub.co/news-feed/p/6460/#acomment-6475 Fri, 03 Apr 2026 20:34:19 +1300 Mergers like Mingledorff and The Home Depot ultimately signal the end of truly tailored repair experiences, reducing everything to faceless transactions rather than the meaningful connections we need in the repair community.

In reply to - Zachary posted an update in the group Troubleshooting & Repairs Hey everyone, just heard the news about Mingledorff’s merging with The Home Depot. I’m curious what we think this means for us in the repair […] ]]> 1f39083bd910ffee33c20acb2e4bc1f8 Jack posted a new activity comment https://hvachub.co/news-feed/p/6315/#acomment-6352 Tue, 17 Mar 2026 21:49:19 +1300 And that’s a pricing problem, not a technical problem. Build leak search into your diagnostic rate.

In reply to - Andrea posted an update in the group HVAC Installation Best Practices System is low on charge. No obvious leak. No oil staining anywhere on the lineset, no traces at the fittings, coil looks clean. Customer […] ]]> 866f539c9713b120cb53f8ba39b24e77 Jack posted a new activity comment https://hvachub.co/news-feed/p/6306/#acomment-6328 Tue, 17 Mar 2026 10:45:07 +1300 Markup covers your admin time alone. coordinating a sub isnt free.

In reply to - Ethan posted an update in the group Troubleshooting & Repairs When you guys bring in a sub on a job, do you usually mark up their labor or just pass their rate through to the client? ]]> 4d97c49d44d18869e873700e5b84fea9 Jack posted a new activity comment https://hvachub.co/news-feed/p/6271/#acomment-6284 Wed, 11 Mar 2026 14:20:45 +1300 18/8 saves the day more often than people think.

In reply to - Tyler posted an update in the group Troubleshooting & Repairs ]]> bba8f583e53e8ab4abcbb218e9d95e42 Jack posted a new activity comment https://hvachub.co/news-feed/p/6182/#acomment-6189 Thu, 19 Feb 2026 09:51:39 +1300 Those are my favorite. Unit starts every third try and they swear it was perfect the day before.

In reply to - James posted an update in the group HVAC Installation Best Practices Had a customer today tell me, It was working fine yesterday.” Funny how that sentence usually means I’m about to find something that’s […] ]]> f30d7628a50df3385e95353b29132b6d Jack posted a new activity comment https://hvachub.co/news-feed/p/6081/#acomment-6106 Sat, 14 Feb 2026 16:01:34 +1300 100% this. Software is just a tool. Garbage inputs = garbage outputs.

In reply to - Mason posted an update in the group Troubleshooting & Repairs Hello, ]]> cfff75c0e44de84e6bbbc298151e77a6 Jack posted a new activity comment https://hvachub.co/news-feed/p/6065/#acomment-6085 Sat, 14 Feb 2026 10:02:53 +1300 Yeah flex is basically a sponge with wire inside.

In reply to - Jacob posted an update in the group HVAC Installation Best Practices Alright I need a reality check. Redoing some duct runs at my Dad’s place. He bought flex and left it sitting for a while. Mice clearly […] ]]> c0499d24e2f9c2bd00d60b07743a361e Jack posted a new activity comment https://hvachub.co/news-feed/p/5984/#acomment-5990 Fri, 13 Feb 2026 07:17:19 +1300 Looks like plain analog gauges to me. Nothing wrong with doing it the way we’ve always done it.

In reply to - Elijah posted an update in the group HVAC Installation Best Practices There’s a difference between it feels cold and actually checking what the system is doing. Pressures, temps, airflow that’s what tells the […] ]]> 62ce12e91b99f109766a20c2b349404a Jack posted a new activity comment https://hvachub.co/news-feed/p/5847/#acomment-5869 Wed, 11 Feb 2026 06:26:14 +1300 Older unit?

In reply to - James posted an update in the group HVAC Installation Best Practices Flame rectification dropping below spec once cabinet temp rises past 120°F. Runs fine cold, problems show up after it’s been on a while. ]]> 504e1a11fe74609c5d56cb596dea020a Jack posted a new activity comment https://hvachub.co/news-feed/p/5807/#acomment-5835 Tue, 10 Feb 2026 13:29:32 +1300 Commercial isn’t about volume, it’s about being the one they trust when something breaks at 2am.

In reply to - Ethan posted an update in the group Troubleshooting & Repairs Trying to push more commercial work and still figuring out where the real leads come from. We do HVAC, refrigeration, kitchen equipment service […] ]]> b229aec9bdbf39b494cf88a3cf3ef03c Jack posted a new activity comment https://hvachub.co/news-feed/p/5820/#acomment-5828 Tue, 10 Feb 2026 11:26:15 +1300 Bet it ran hot for a long time before it finally gave up.

In reply to - Aiden posted an update in the group Troubleshooting & Repairs This motor’s been making noise for a while. Guess today was the day it finally quit. ]]> 99e12d4408cf3f0a67b6c270d2f2c570 Jack posted a new activity comment https://hvachub.co/news-feed/p/5751/#acomment-5791 Sun, 08 Feb 2026 16:25:59 +1300 I love getting blamed for systems that were already on life support.

In reply to - Davida posted an update in the group Troubleshooting & Repairs Hello, ]]> a7a4f4f17ae7a5e6c5c59a7dfdf087b8 Jack posted a new activity comment https://hvachub.co/news-feed/p/5598/#acomment-5630 Thu, 05 Feb 2026 10:26:25 +1300 Honestly, if you’re doing full systems and duct for dirt cheap, you’re better off working for someone else.

In reply to - Ethan posted an update in the group Troubleshooting & Repairs Trying to tighten up how I’m pricing new residential builds. I’ll go deep into plans, take my time, and still end up missing jobs or finding out […] ]]> dfbae631e6f5428419ca00ea4d2e654b Jack posted a new activity comment https://hvachub.co/news-feed/p/5439/#acomment-5467 Sat, 31 Jan 2026 11:12:38 +1300 Some supply houses around here will do takeoffs if you’re buying equipment through them. Not perfect, but helpful.

In reply to - Juan posted an update in the group HVAC Installation Best Practices Hello ]]> b21cb0a4dd04c4e02bdb39b4b40c3db2 Jack posted a new activity comment https://hvachub.co/news-feed/p/4490/#acomment-4496 Sun, 11 Jan 2026 03:10:23 +1300 I’ve started testing my meter before I even step inside now.

In reply to - Tyler posted an update in the group HVAC Installation Best Practices Got to site today and the digital multimeter started acting up. Readings kept dropping and resetting, so we spent almost an hour just […] ]]> cf4c2585fab62dc9933f3dddc0566e59 Jack posted a new activity comment https://hvachub.co/news-feed/p/4233/#acomment-4234 Fri, 02 Jan 2026 17:58:29 +1300 That dust buildup always tells you how often no one’s been inside there.

In reply to - Emiliano posted an update in the group HVAC Contractors & Subcontractors This unit’s been running longer than it should without anyone actually checking it. Numbers were fine. But the panel told a different […] ]]> 7ed950b0ce6ddd4761414cd6eded8b42 Jack posted a new activity comment https://hvachub.co/news-feed/p/4094/#acomment-4103 Mon, 29 Dec 2025 19:01:13 +1300 Bad notes are worse than no notes.

In reply to - Salvatore posted an update in the group Troubleshooting & Repairs Walked into a job with a full service history attached… and still felt like I knew nothing. Notes said checked, adjusted, monitor, but none of it […] ]]> b39361243acf85d1f9c3f987fbebfbf6 Jack posted a new activity comment https://hvachub.co/news-feed/p/3985/#acomment-3992 Wed, 24 Dec 2025 13:42:39 +1300 Sensor placement is everything.

In reply to - Ethan posted an update in the group HVAC Installation Best Practices Spent a few days chasing a control issue that just didn’t make sense. Return air temp kept drifting higher every afternoon, driving resets […] ]]> e7778121fe2c5f8a3d285cb899e9fc8f Jack posted a new activity comment https://hvachub.co/news-feed/p/3290/#acomment-3293 Mon, 24 Nov 2025 18:10:16 +1300 That’s the classic “I’ve been dying quietly for months” look 😂

In reply to - Maxime posted an update in the group Troubleshooting & Repairs Found this inducer motor dripping oil today while checking a no-heat call. Not sure how long it’s been leaking, but the whole thing feels weak and […] ]]> dd81b6e41bfc861adaab9897d0345948 Jack posted a new activity comment https://hvachub.co/news-feed/p/2713/#acomment-2715 Wed, 29 Oct 2025 13:56:34 +1300 Exactly. The system’s only as good as its airflow setup.

In reply to - Caleb posted an update in the group HVAC Installation Best Practices Air balancing isn’t just a final step; it’s what decides if the system actually performs the way it was designed. ]]> f2e288e32af02745ea366e47066d86d8 Jack posted a new activity comment https://hvachub.co/news-feed/p/2665/#acomment-2677 Mon, 27 Oct 2025 14:26:14 +1300 Haha, fingers crossed it’s just a connection and not a full teardown.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’m troubleshooting a chilled water pump with a VFD – pump is running, amps look normal, but flow rate is inconsistent. Sometimes it dips even […] ]]> 5026fbd678ba0110b4f461dad59ee1b7 Jack posted a new activity comment https://hvachub.co/news-feed/p/2665/#acomment-2675 Mon, 27 Oct 2025 14:26:13 +1300 Ah, hadn’t considered firmware. I’ll check the VFD version and see if updates are needed.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’m troubleshooting a chilled water pump with a VFD – pump is running, amps look normal, but flow rate is inconsistent. Sometimes it dips even […] ]]> e211f3daab4a6d40e1f53518d28ebbe6 Jack posted a new activity comment https://hvachub.co/news-feed/p/2665/#acomment-2673 Mon, 27 Oct 2025 14:26:11 +1300 Great call! It’s a single pump now, but worth knowing for future multi-pump setups.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’m troubleshooting a chilled water pump with a VFD – pump is running, amps look normal, but flow rate is inconsistent. Sometimes it dips even […] ]]> 227ee645a5a54de82b1f3475bc3328c6 Jack posted a new activity comment https://hvachub.co/news-feed/p/2665/#acomment-2671 Mon, 27 Oct 2025 14:26:11 +1300 Haha, exactly! Feels like you need a PhD just to read the manual sometimes.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’m troubleshooting a chilled water pump with a VFD – pump is running, amps look normal, but flow rate is inconsistent. Sometimes it dips even […] ]]> fe3688b3b235b933bc65966a80796330 Jack posted a new activity comment https://hvachub.co/news-feed/p/2665/#acomment-2669 Mon, 27 Oct 2025 14:26:09 +1300 Yeah, I was thinking impeller wear too – might have to open it up for inspection.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’m troubleshooting a chilled water pump with a VFD – pump is running, amps look normal, but flow rate is inconsistent. Sometimes it dips even […] ]]> 83c680bbc672eba425d455e878f5d9e3 Jack posted a new activity comment https://hvachub.co/news-feed/p/2665/#acomment-2667 Mon, 27 Oct 2025 14:26:08 +1300 Good point! I’ll review the frequency limits and see if that stabilizes it.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’m troubleshooting a chilled water pump with a VFD – pump is running, amps look normal, but flow rate is inconsistent. Sometimes it dips even […] ]]> 97512f2500f7860704ba20beb20e68bd Jack posted an update in the group HVAC Installation Best Practices: I’m troubleshooting a chilled water pump with a VFD - pump […] https://hvachub.co/news-feed/p/2665/ Mon, 27 Oct 2025 14:26:06 +1300 I’m troubleshooting a chilled water pump with a VFD – pump is running, amps look normal, but flow rate is inconsistent. Sometimes it dips even though the system demand is steady.

Checked for air pockets, leaks, and filter restrictions- all good. Suspecting either VFD parameter misconfiguration or pump impeller wear, but haven’t opened it up… Read more

]]> 11 6b4c84b5226cdefe3f5594f82b303354 Jack posted a new activity comment https://hvachub.co/news-feed/p/2560/#acomment-2561 Wed, 22 Oct 2025 13:56:19 +1300 Also verify that the airflow is truly consistent -sometimes filters or dampers hide restrictions.

In reply to - Liam posted an update in the group HVAC Tools & Equipment Noticed the evaporator coil icing up on a commercial AC. Airflow looks fine, refrigerant charge seems correct, but the coil keeps freezing […] ]]> acdd02e2fba22e52e7b881e8cf3c7668 Jack posted a new activity comment https://hvachub.co/news-feed/p/2283/#acomment-2288 Sun, 12 Oct 2025 21:24:15 +1300 If it’s Wi-Fi based, maybe interference from other devices? I had a Nest acting up every time the customer’s microwave ran 😅

In reply to - Noah posted an update in the group HVAC Tools & Equipment Ran into something weird today -a smart thermostat kept losing communication with the air handler, even though Wi-Fi and power were fine. Tried […] ]]> 713a389c6094cddc14e7452356bbacf9 Jack posted a new activity comment https://hvachub.co/news-feed/p/2175/#acomment-2181 Mon, 06 Oct 2025 18:23:50 +1300 True! Regular cleaning and maintenance go a long way in keeping systems effective and safe.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’ve noticed many buildings have poor ventilation, which affects air quality, comfort, and even energy bills. ]]> ac82c7144b622be7917e17a1102f1f76 Jack posted a new activity comment https://hvachub.co/news-feed/p/2175/#acomment-2179 Mon, 06 Oct 2025 18:23:49 +1300 That’s a solid approach! Balancing both often keeps energy use low while maintaining good air quality.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’ve noticed many buildings have poor ventilation, which affects air quality, comfort, and even energy bills. ]]> 89fe50535864948e9f7450174f214f1a Jack posted a new activity comment https://hvachub.co/news-feed/p/2175/#acomment-2177 Mon, 06 Oct 2025 18:23:48 +1300 Exactly! Even small improvements in airflow can make a huge difference in comfort and productivity.

In reply to - Jack posted an update in the group HVAC Installation Best Practices I’ve noticed many buildings have poor ventilation, which affects air quality, comfort, and even energy bills. ]]> afa283fbce1099010f9f428b7a805795 Jack posted an update in the group HVAC Installation Best Practices: I’ve noticed many buildings have poor ventilation, which […] https://hvachub.co/news-feed/p/2175/ Mon, 06 Oct 2025 18:23:47 +1300 I’ve noticed many buildings have poor ventilation, which affects air quality, comfort, and even energy bills.

]]> 6 e96b4faa205e97f8451dbaa67b522490 Jack posted a new activity comment https://hvachub.co/news-feed/p/2005/#acomment-2016 Thu, 02 Oct 2025 17:29:24 +1300 I used a small 2 HP single-phase compressor on a 3-phase line with a digital converter. It works fine, but I only run it intermittently – continuous operation caused heat buildup.

In reply to - Brandon posted an update in the group Troubleshooting & Repairs Hey guys, how’s everyone doing? Quick question for the group – is it safe to run a single-phase compressor on a three-phase supply using a phase […] ]]> 82908e09fe230e42ec6a93ee9fd0f431 Jack posted a new activity comment https://hvachub.co/news-feed/p/1427/#acomment-1442 Fri, 22 Aug 2025 10:31:55 +1200 Been doing split systems for years-should’ve learned sooner to check every manual valve before going deep.

In reply to - Dylan posted an update in the group HVAC Installation Best Practices Walked into a commercial job today to find two 15-year-old VRF indoor units throttled flat-out every morning-full on fan speed, fuzzy […] ]]> c70e0f9b14151706634cda7efadd7c1e Jack posted a new activity comment https://hvachub.co/news-feed/p/528/#acomment-551 Tue, 06 May 2025 08:23:48 +1200 Happened to me last year. We tried to explain the risks, but the client wouldn’t hear it. Had to push for more time by showing how rushed installs lead to failures.

In reply to - Miles posted an update in the group Troubleshooting & Repairs

Hey team,

I really need your input on something serious we’re facing in a current project.

It’s a large-scale HVAC job—but the design coordination is […]

]]> ef2a1573713d36d49e25939fd67a274a Jack posted a new activity comment https://hvachub.co/news-feed/p/347/#acomment-362 Mon, 05 May 2025 06:29:30 +1200 Sometimes I take pictures of the old ducts and include them in my proposal as a red flag.

In reply to - Jacob posted an update in the group Troubleshooting & Repairs

A Big Lesson from a Big Project – Water Leakage from Existing Ducts

Hey everyone,

I wanted to share a recent situation from a major project I’ve been […]

]]> 3a8d917e586f9c9f8d025f4ef4d1d141 Jack posted a new activity comment https://hvachub.co/news-feed/p/300/#acomment-327 Thu, 01 May 2025 11:19:54 +1200 Crimped flex duct with 5 turns in 3 feet. Just run it clean!

In reply to - Julien posted an update in the group HVAC Installation Best Practices

What’s one common install mistake you hate seeing out there?

I’ll go first: Sloppy line set insulation!

Drop yours below—let’s make this a […]

]]> 8c350fde35e06a6f56845c28d92d8493 Jack posted a new activity comment https://hvachub.co/news-feed/p/158/#acomment-161 Thu, 17 Apr 2025 08:27:59 +1200 Use thermal for duct leaks.

In reply to - Matteo posted an update in the group HVAC Tools & Equipment

Been thinking about this a lot lately — there’s tools I grab every single day without even thinking, and there’s others I thought I had to have, but […]

]]>