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Discussion Starter #1
Hi everyone. I was wondering how you go about measuring TESP if the evap coil is right on top of the AH. I know you measure directly after the filter (blower compartment) and between the AH and evap coil, but in several cases, it is difficult to find a good place to measure between AH and evap coil..

Any tips you have would be helpful.

Thanks.
 

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Drill hole in the furnace jacket.
Or, remove limit, and measure there.
 

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Discussion Starter #3
Drill hole in the furnace jacket.
Or, remove limit, and measure there.
Thanks beenthere.

Do you typically also drill a hole in the blower compartment door for the negative pressure, or do you remove a side plug and test there?
 

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Side plug if there is one. Or through a rubber wiring harness.
Drill if not.
 

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Discussion Starter #6
Drill hole in the furnace jacket.
Or, remove limit, and measure there.
Just wondering, when I remove the limit and use that hole to test, can I just let the limit hang down or should I remove the two wires from it first before I turn the power back on?

Don't want to shock myself.
 

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It can hang, as long as you keep it from shorting against anything.
 
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