B15 - checking the air pressure switch, Checking the air pressure switch, Blower proving switch – LAARS NeoTherm NTV (Sizes 150–285 MBTU/h) - Service Manual User Manual
Page 43: See section b15, Checking the air, Pressure switch, See procedure b15
33
Service Manual NeoTherm 80 - NeoTherm 285
Checking the Air Pressure Switch - Blower Proving Switch
Exhaust vent
blocked?
Yes
No
Clear the vents.
Check the bird screens
or terminals.
Check for blocked air intake
and exhaust vents.
Clean with a shop-vac.
Dirty fan?
Yes
No
Test the air pressure switch.
(See Section B16.)
Switch is OK?
No
Replace switch.
Yes
Problem with
blower?
Yes
No
Heat exchanger
is plugged?
Yes
B15
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