Ask Experts Questions for FREE Help !
Ask
    johnair77's Avatar
    johnair77 Posts: 59, Reputation: 1
    Junior Member
    		  
    #1

    Feb 22, 2010, 06:14 PM
    80% luxaire pressure switch opens after 8 minutes
    Opens for 1 second and resets just as quick and then loses vacuum from .9 to .6 in another 4 minutes and repeats, added new switch and new press hose still doing it, pulled vent pipe and still doing it, stopped main blower in mid-cycle and still trips, vent mtr. Pulling normal amps, possible weak mtr.?
    letmetellu's Avatar
    letmetellu Posts: 3,151, Reputation: 317
    Ultra Member
    		  
    #2

    Feb 22, 2010, 06:53 PM

    How long does the vent motor run, and what is the .9 and .6 is this the amps on that motor or the amount of vacumm.

    About the 4 minute wait, if you are diagonosing and want to shorten that time just unplug the unit and replug it.

    Take the vent pipe off the connection coming out of the furnace and use a vacuum hose from your vacuum and clean out all of the housing where the assist motor is. Reassemble and try.
    johnair77's Avatar
    johnair77 Posts: 59, Reputation: 1
    Junior Member
    		  
    #3

    Feb 22, 2010, 09:12 PM

    .9 is beginning vacuum, 6 in. w.c. is the trip point, when vent gas is 1st vented the vacuum is high and as it runs longer it begins to trip, inspection of interior of inducer revealed nothing out of the ordinary, but I did not vacuum out as of yet.
    johnair77's Avatar
    johnair77 Posts: 59, Reputation: 1
    Junior Member
    		  
    #4

    Feb 23, 2010, 07:38 PM

    Answering my own questions now.. went back today and took off ventor mtr. Assy. And cleaned and vacuumed wheel etc. etc.. . found the bearings to be tightening up and causing press. sw. trip, replaced mtr. Assy. And all is well once more.. thx. letmetellu..
    letmetellu's Avatar
    letmetellu Posts: 3,151, Reputation: 317
    Ultra Member
    		  
    #5

    Feb 23, 2010, 08:08 PM

    You did good, on that little motor it is hard to tell when the motor bushings are slowing the fan enough not to work the switch.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Well pressure drops after 5 minutes [ 6 Answers ]

I am having a problem with my water pressure. I have a well. When I turn the shower on, the water pressure is fine for about 4 minutes, then it goes down to nothing. I watched the pressure gauge on the tank and here is what I saw: When the pressure was good, the pressure on the tank was...

Where is the high limit switch on a luxaire furnace [ 2 Answers ]

Where is the high limit switch on my luxaire furnace so I can reset it. As soon as it calls for heat the led light flashes red four times and the code is limit switch open. Everything starts up the ventor motor and the blower but there is no flame. I need heat

I have a luxaire trouble code flashing limit switch open [ 2 Answers ]

The furnace seems to start up small fan starts OK the flame lights then the gas shuts off and the flash code flashes 4 times (limit switch open)??

Hot water pressure depletes in 5 minutes [ 10 Answers ]

Hi. This is my first time to the forum group, so I don't know how to start. We bought this house in 2000. It is now around 28 years old. For about 2 months now, every time you take a shower, there is hot water, but it lasts up to 5 minutes. The water in the toilet tanks used to be cold, now...

Water well pressure bleed off in 10 minutes [ 5 Answers ]

Hi, I am trying to pin point a problem with my water well. I have a down hole pump with a pressure tank and pressure valve in the house. My problem is that I am having a drop in pressure with no water usage. My pressure switch is set to kick the pump in when it drops to 22 psi. It kicks out at 45...

View more questions Search