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Old 02-16-2014, 05:41 PM   #1
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I am not getting 100 degrees across all four vents when unit come on. Its a york rtu...im getting 100, 80, 60, 40 degrees on a good day. Sometimes 40...36degrees

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Old 02-16-2014, 07:16 PM   #2
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Is it gas/electric, or electric/electric.

What 4 vents? What kind of duct work?

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Old 02-16-2014, 08:36 PM   #3
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Sounds like the ductwork is uninsulated.
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Old 02-16-2014, 08:55 PM   #4
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Is it gas/electric, or electric/electric.

What 4 vents? What kind of duct work?
Gas/electric

two units on the roof...same set up...even distribution at the registers for the first unit. Unit#2 varies at each registers as you go further away.
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Old 02-16-2014, 08:56 PM   #5
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Sounds like the ductwork is uninsulated.
It had a lot of leaks at first but I sealed the ductwork. Still not getting even distribution.
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Old 02-16-2014, 09:14 PM   #6
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Is the duct work in conditioned, or unconditioned space. How far a way is the last register from the first register. is it a 2 stage unit, and only operating in first stage.
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Old 02-16-2014, 09:22 PM   #7
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Is the duct work in conditioned, or unconditioned space. How far a way is the last register from the first register. is it a 2 stage unit, and only operating in first stage.
Conditioned space...25 feet away. Its a two stage unit. Not sure if its operating only in first stage.
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Old 02-16-2014, 09:23 PM   #8
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How do I determine at what stage its operating
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Old 02-16-2014, 09:30 PM   #9
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How do I determine at what stage its operating
Out your meter's probes on W2 and common at the unit. 24 volts and it shold be in second stage. Make sure the second stage burner is really burning. No 24 volts and its in first stage.
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Old 02-16-2014, 09:54 PM   #10
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Out your meter's probes on W2 and common at the unit. 24 volts and it shold be in second stage. Make sure the second stage burner is really burning. No 24 volts and its in first stage.
Second one is burning but not as hot...when I tried to increase to 3.0 WC it tripped the safety.
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Old 02-17-2014, 04:03 AM   #11
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Sounds like a return air or lack of supply problem. First stage may also have its pressure turned down. Correct air flow problems, then gas pressure can be adjusted to where it should be.
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Old 02-17-2014, 12:21 PM   #12
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Ok. I can see inside the return nd its clear. Yes. Its the air supply I have to figure out
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Old 02-17-2014, 12:48 PM   #13
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which safety did it trip? high limit or flame rollout. if it is flame rollout then you got a cracked or obstructed heat exchanger.
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Old 02-17-2014, 12:53 PM   #14
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which safety did it trip? high limit or flame rollout. if it is flame rollout then you got a cracked or obstructed heat exchanger.
Flame rollout when I increased the gas pressure.
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Old 02-17-2014, 03:20 PM   #15
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Flame rollout when I increased the gas pressure.
If its a down flow. pull the supply panel on the opposite side from the burners. Look at the seem for cracks.


PS:, Nice catch yuri.

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