Tag: air conditioning repair

Ambitious? Just Back Off

Daily writing prompt
Describe the most ambitious DIY project you’ve ever taken on.
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When it comes to DIY, ‘ambitious’ isn’t in my vocabulary. Honestly, I keep it simple.

I miss the old days, when part of my DIY routines were working on the car. Changing oil, cleaning or replacing the spark plugs, setting the ignition timing, rotating the tires, installing new brakes, bleeding that system, replacing the radiator coolant, etc. Those were fun and rewarding DIY projects. Then, though, cars became complicated. Engine bays became packed so tightly that reaching spark plugs was an ordeal. Getting to the oil filter was a nightmare. I’m reduced to installing a new battery in the car and topping off the windshield wiper fluid.

Around the house, I’ve done multiple small jobs. Replaced the furnace’s control board. Installed new thermostat. Replaced the filters, installed capacitators on the air conditioning, along with some other pieces on it. I’ve installed new light fixtures in various rooms, took the dishwasher apart and fixed it, and did troubleshooting on the microwave, replacing fuses and different parts. Likewise, I’ve done some plumbing work but I keep it simple. I’ve painted all the rooms except two, installed a blower in the gas fireplace, and do all my yard work. Yes, I’ve installed some shelving and assembled furniture.

On my computers, I’ve swapped out hard drives, processors, fans, video cards, and power supplies, and added or changed memory. In many ways, I think of them as the modern equivalent of working on cars back when cars had mechanical systems. I’ve installed and replaced routers and modems, replaced keyboards, added different streaming devices and printers, and did basic troubleshooting on software and security, uninstalling, reinstalling things as necessary, and took apart the keyboards and cleaned them.

Many of these things are driven by being cheap. I don’t want to pay others for what I think I might be able to fix. I’m also driven to understand these things more. I want to know how they work, how the parts interact, etc. These systems are mature and demonstrate ingenious engineering solutions. Finding how they work amazes me, and the Internet is a useful tool for that purpose. Then, to restore them when they’ve died is such a validating process.

That validation process is a big component. In a complex world, where so much seems beyond our control, it’s satisfying to take something broken apart, and make it work again. Just keep it simple.

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DIY Fail

I’ve been working on my home HVAC system. The AC did not kick on when needed two weeks ago. Playing around with the system, the fan didn’t come on, the heat didn’t turn on, the air conditioner did not engage.

After tracing wiring and troubleshooting, I drew down on the stepdown transformer. The board wasn’t getting energy. The board’s fuse was intact, all circuit breakers and switches in the proper locations, etc., but the board’s diagnostic light was dark. I thought I’d accurately followed all the steps that led to the transformer but replacing it did nothing.

That leaves me at a circuit in the road. Call in a pro or keep at it myself. I’m reluctantly inclined to bring in a pro but my inner idiot (I2, also sometimes referred to as I squared) is saying, “No, mate, don’t give up, you got this.” That aligns with my overall philosophy that to succeed, failure must be risked and overcome.

My wife seems inclined to let me continue. Although we have high heat, she’s been using an electric fan and shrugging it off. That reminded me that we’ve existed without AC before. Both of us grew up in homes deprived of having AC. Early duty stations in the military included Randolph AFB, Texas, outside of San Antonio. I remember us enduring a string of days over 100 degrees F. Our military homes on Okinawa and our home in Germany also didn’t have AC.

So, you know, we can survive without the air conditioning if we’re prudent and thoughtful. It is a nicety we’d like to have but we don’t find it overly necessary. As far as fixing the AC, I’ll get with my wife and talk it over.

I think I’d be happy either way.

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A/C DIY Completed

I finished another DIY project — a repair — yesterday but I made several errors with this one. I’ll go into those. I want to also mention that I stayed overly zealous about throwing circuit breakers, ensuring everything was off, and cautiously touching wires. I won’t dwell on it, but I took constant steps to stay safe and unharmed. I was messing with 240 V a lot of times, and I stayed respectful of that.

Our air conditioning went out. Fortunately, the weather here hasn’t been too hot this year; we’ve yet to break 100 degrees F, and temperatures have been dropping into the upper 50s/low 60s at night. We also haven’t been inundated with wildfire smoke, so the air remains relatively clean, fresh, and healthy. It’s a mighty confluence of good fortune. We’re able to open doors and windows at night and in the morning to air the house out, dropping the inside temperatures to about 72 F. We just need to be aware of wildlife like skunks, raccoons, bears, deer, and cougars in the area, and make sure none of them wander in. Then we close almost all back up for the day, including the blinds, and keep the house cool. This works pretty well; it rarely pops over 82 F in the house, and that feels oddly comfortable. We do have a fan that we’ll kick on if we feel the need.

But one day, my wife said, “Turn on the air,” and I did, and it didn’t. The house blower went on but there was nothing from the condenser or fan. I immediately said, “Capacitor.” It’s gone out twice in the seventeen years we’ve owned the house, which was bought new. I ordered a new one, turned off the circuit breakers, pulled the A/C switch, removed the panel, and replaced the capacitor. All good, right?

No. I inspected the capacitor. Didn’t see any swelling or anything unusual. Wires were all connected. Hmmm.

Continuing on my mistake-strewn path, I powered the unit up and manually pressed the connector’s pull in. Power to the unit. Condenser and fan went on.

Well, damn. A bad connecter then? I ordered a new one and duly installed it. No change. Say what? I’d photographed the wires before swapping the part and poured over them now, ensuring I had them all right and secure. They were. Nuts.

Well, then, it must be the thermostat.

I’d replaced it last year. Maybe I’d done something wrong. I checked all of its wiring. Everything was correctly connected and tight. I replaced the batteries so they were new. No change.

I started searching the net for what the heck was wrong. This is something I should have done in the beginning. Pulling out the multimeter, I checked power at the unit — yep, 240 running into it, no surprise, as it fired before. No low voltage going into the connecter.

Whaaat?

The wires all looked good. Connections were solid, but nothing registered. Nothing. No damage visible. No nests, spiders, or insects. No traces of mice. Huh.

Back at the thermostat, I placed my probes against the red (power) and yellow (cooling) wires. 24 volts.

Then it must be on the furnace control board.

Nuts.

We have a side mounted furnace. It’s up in the attic above the garage. It’s a low, hot space. I dislike going up there and working on the furnace. It means pulling the car out, and using two ladders. One must be climbed to remove the access panel, but that ladder isn’t tall enough for me to safely climb and get up into the space. I must use a second, taller ladder, putting it into the access panel’s open space to climb up into the attic.

The furnace’s control board’s green light was lit but blinking. That’s how it usually is. I removed the access panel with the idea of checking all the wires. Yep, five into the thermostat connections, just as shown on the videos. Second was the fuse. Fuse was great. Next, I was going to check the low voltage power out of the stepdown transformer. As I was approaching that, I noticed a wire not connected to anything.

A yellow wire.

Now, you might think that’s obvious. In hindsight, it is. But there’s a large coil of installed but unused wires up there. That gave me uncertainty; maybe it wasn’t meant to be used.

I was thinking about all I learned but I still had just a nascent understanding of everything. Back down I went to videos. I really enjoy the Word of Advice series on Youtube. He’s patient and thorough.

I watched his video on the control board’s fuse because he was talking in general about the control board and all the wires and their purposes. And he said, “There should be five wires going in for the thermostat and two going out to the outside unit.”

Ding.

I had one going out. The blue one. No yellow one connected.

Power was cut and the connection was made. Success was achieved. The condenser and fan fired up and the house cooled.

Everything was reinstalled, closed up, and powered up. Success, but it was sloppy and haphazard. I should have been methodically testing and studying and not leaping to conclusions without testing. Lesson learned, I hope.

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