I had one installed eight years ago when I bought my house. I’ve used it to heat the entire place, but this winter, I struggled to maintain even 20°C indoors on really cold days.
Well, today I finally brought my air compressor inside and gave the guts of the indoor unit a thorough blasting - and now it feels like an oven in here. I’ve been lowering the thermostat all day, and it’s still way too hot. It literally feels like it’s putting out twice the heat now. I was expecting a slight improvement, but nothing like this.
This is why HVAC companies tell you that you need to have maintenance performed on them once a year on each system. That’s not an upsell that’s to maintain the warranty as they literally wont run as well year over year without cleaning and will half the life of your expensive system.
I go to an HVAC supplier every year and buy this green can of amazing chemicals. Spray the fins, let sit for about 15min, then spray off with a hose. Gleaming, shiny metal.
Still feels like an upsell. Just take a hose and spray down the coils and/or vacuum.
Hey, it’s your warranty. They do more than just spray down your coils. They’re checking for pressure loss and leaks as well as cleaning the blower motor and wheel (which is where a lot of issues occur).
You can take out the blower motor - it’s not that hard.
I’m not sure what to say about leaks and pressure loss. My HVAC tech recently refused to find the issue and just refilled my refrigerant instead….
Be careful hosing it down or scrubbing it. Those radiator fins are delicate and shouldn’t be bent or broken.
I won’t say don’t do it because I dunno, its probably fine. But watch a how to video or read up on it first. Just don’t put a firehose on it.
No one is telling you to power wash or scrub. If you rinse it often enough you’ll be fine. If a hose ain’t doing it for you, you are better off getting an HVAC tech to use their special cleaner that is only sold to HVAC techs
No, but some people get some carried away ideas when they hear “clean that machine”.
…or to anyone who can walk into a big box store and grab a product off the shelf.
Lol
If you know what you’re doing, then sure. I do not. I know too many stories of people who attacked delicate machinery with their good ideas and then got all surprised when it afterwards functioned worse, and not better.
Don’t. It’s a good way to get mold, and the AC blowing the unhealthy spores around the house.
Any decent AC maintenance company uses special gear and likely those cleaning foams that minimises this risk.
I don’t think anyone is suggesting you take a hose to your indoor units. How on Earth you would contain the splashback is anyone’s guess.
Use your hose on the outdoor unit. I use compressed air on the indoor ones, like OP. You can buy the cleaning foam stuff, too. Probably from whoever made your split system, in fact. I’ve never found it to be necessary, though.
I mean, I guess that would work, but why wouldn’t you use a vacuum cleaner? I mean, if you’re hitting it with compressed air, now all the dust is all over the room.
Compressed air combined with a vacuum cleaner to capture what the compressed air blows loose.
It’s impossible to get a vacuum in all the nooks and crannies. Especially between the fins. Compressed air is pretty much the only option.
Yeah. Just prepare for dust. Wear a mask, open a window…
Are you suggesting you hose down an indoor unit?
No, I think I misunderstood.
What I was trying to say: I think there are good reasons for having professionals clean your AC.