Very warm water coming from H/VAC house drain pipe


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Old 03-05-20, 04:36 PM
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Very warm water coming from H/VAC house drain pipe

Neither the heating or air conditioning was on today.
Noticed very warm water constantly coming from H/VAC house drain pipe.
Looked in attic at unit and nothing unusual with unit visually.
What could it be?
 

Last edited by PJmax; 03-06-20 at 04:45 PM. Reason: corrected first line of text
  #2  
Old 03-06-20, 08:29 AM
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Where do you see this water?

AC primary drains usually pipe into the plumbing under a bathroom sink. It would be difficult to notice the temperature?

Air conditioner secondary drains usually come out over a window in my area. If the drain comes out of the house closer to ground level I would expect it to be from the water heater.

A pop off valve from the water heater might put out some warmer water.
 
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Old 03-05-20, 05:11 PM
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We need to know more about your system.
Gas furnace ?
Heat pump ?
Geothermal ?
Were you in heating or cooling mode ?
Do you have a humidifier ?
If the water was warm I'd expect it to be coming from a humidifier.
Some condensing furnaces discharge warm water but it's usually minimal.
 
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Old 03-05-20, 05:12 PM
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You have eyes on the issue, we cant really see what is going on. Your in heat mode, I assume, no location posted, so no condensate, is there water running to a humidifier, is it a GEOthermal unit?
 
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Old 03-05-20, 06:44 PM
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Miss typed, "The heating or air conditioning were not on today."

Just HVAC with gas furnace.
Not on at all today.
 
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Old 03-05-20, 07:58 PM
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Pictures of the drain would help.
are you certain it’s straight air conditioning with a gas furnace?
 
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Old 03-06-20, 01:40 PM
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Yep, checked hot water pressure relief valve...it's leaking.
 
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Old 03-06-20, 01:53 PM
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Is the water heater relief piped into the air conditioner drain?
 
 

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