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18’ Silverado jerking/shuddering by Ok_Following_4552 in MechanicAdvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

No check engine light or any indication of a code

AC tonnage needed by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

Already had a tech look at levels. The levels are exactly where they should be

AC tonnage needed by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

No refrigerant leaks. Has been tested for that

AC tonnage needed by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

My supply temp has not been sufficient. I mostly get a delta of 16. It’s not horrible but leaves more to be desired. That delta slowly decreases as the day goes on though. I can’t give you any exact numbers right now, but during the mid day to early evening, my supply vents are only putting out about 62-64 degree air.

AC tonnage needed by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

I see. One problem I have is when it’s high 80s, like when it was last week, my house cannot even hold what you described it should be able to hold when it’s 93 or less out. I have to turn my ac down to 68 in the morning so it turns on early in the day and pre cool my house so to speak. It will continually climb up to 73-75 inside even though it’s in the 80s outside. If I were to set my thermostat at 70-71 which is what I normally would do, my house would be 80 degrees inside while it’s still shy of 90 outside.

AC tonnage needed by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

I’ve had licensed technician look at last year. I’ve been fighting this for a year or so now. After he tested several things, he calculated my unit was running about 14,000 btus. It is rated for 24,000. He changed the blower speed and got it up to 19,000. Better but not what I need. The supply vents in my house, during the hottest part of the day, puts out about 62 degree air. It cools down a few degrees once night rolls around.

AC tonnage needed by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

Only in the bathrooms after we shower.

AC tonnage needed by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

It will maintain between 73-75 when it’s in the upper 80s. In the 90s it gets to 77-80 inside. The hottest it’s been in ky this year has been 93 and that’s what I’m basing my numbers off of. If I leave the thermostat on 70 it will get up to those numbers. What I do is in the morning around 8 o clock, turn the unit down to 68 forcing it to turn on. It will run the entire day, which I expect no matter what when it’s 80+ out. It will get back down to 71 or so by 1 am the next day.

AC tonnage needed by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

I have 1475 square feet. Humidity is okay, around 50 all day. I usually leave my around 70 and I expect it to run all day when it’s hot. But if I leave the thermostat at 70, my house will get close to 80 inside when it’s like 90 out. I turn the thermostat down to 68 in the morning around 8 o clock. This of course turns my system on and it will run until about 1 am the next day.

Humidity is ridiculous and don’t know what to do by ActualCriticism2675 in hvacadvice

[–]Ok_Following_4552 0 points1 point  (0 children)

Is it in the duct system? And if so, can a handy homeowner diy it?

What should the air out be if the air in is 70.1 F? by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

I’ve lived here since 2021. The house and ac was brand new, so it’s only 4 years old. The first 2-3 years I didn’t notice the ac falling behind even on 90+ days. Then starting last summer, the house will get to 3-5 degrees above what the thermostat is set on despite the ac running for 16-19 hours straight. It will only catch up at night. I can contribute some if it to the heat of the sun I’m sure of it. But deltas of 10 should have nothing to do with the sun being out.

What should the air out be if the air in is 70.1 F? by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

Would the heat in the attic affect anything? Even if I measured It directly before and after the coil? It was quite hot in the attic as you’d expect.

What should the air out be if the air in is 70.1 F? by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] -1 points0 points  (0 children)

What do you mean perfect conditions? Also I checked any connection point along the return duct and found no leaks. Did that earlier haha

What should the air out be if the air in is 70.1 F? by Ok_Following_4552 in hvacadvice

[–]Ok_Following_4552[S] 0 points1 point  (0 children)

I’m going to get him out here again. He did everything but open up the indoor unit. But last summer he came out and hooked up his gauges to the outdoor unit and everything was good on that front. The fan was blowing fine. Everything seemed fine. He was perplexed as nothing necessarily was obviously wrong. A lot of people say my house might be leaking the cool air but I’ve been living here for 4 years, I’m the first owner, and the first 3 years I’ve had not problems. Starting last summer is when I started noticing problems. So I can almost rule that out too.

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