LF24 Unit heater - http://www.hvacmechanic.com/ Forums
Original message
| hvactechin
 |  "LF24 Unit heater"
, posted Tue 16 Sep 21:41  
i have a LF24 unit heater and its not proving the pressure switch. The inducer housing and port is clean. Inducer is pulling 1.5 wc to the switch. Amps on the inducer is .65aac. Has anyone ran into this problem and what can be causing it. I've replaced the pressure switch and that wasnt the problem.
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Replies:
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| learner
| "Re(1):LF24 Unit heater" , posted Wed 17 Sep 02:22
Hi,
Pulling? That means vacuum. The switch is diffrential type. You
don't suppose to blow or suck into the pressure port with your mouth. If there is a current flow across switch that means switch is is closed. Next logic board has to sense that condition(switch closed)
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