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  1. Vapac humidifier LE40DA stuck on inializing

    Working on a Vapac LE40DA, replaced cylinder today(leaking from electrode), board was recently replaced by other contractor, unit is stuck on intializing. and i can not get past this issue. ...
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    1,166

    Have had numerous Trane rtu's this winter with...

    Have had numerous Trane rtu's this winter with this issue, enough to cause tripped main breakers, have had to get heat gun out and dry electical.
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    21
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    1,902

    Got back to unit today, and traced all wireing. ...

    Got back to unit today, and traced all wireing. Traced wireing from fan delay and found coil on delay h1 and h2 were wired one to tr on gas valve and the other to tr-th(coil) on gas valve. moved...
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    1,902

    Stupid question but, if limit breaks transformers...

    Stupid question but, if limit breaks transformers primary 120, what powers fan?
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    21
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    1,902

    Unit is from 1975, one limit 3 terminals on it,...

    Unit is from 1975, one limit 3 terminals on it, no cracks on exchanger,pilot always stays lit. I have 120v at either side of limit when it opens, longer than usual amount of time before fan comes on...
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    21
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    1,902

    . Yes pilot stays lit

    . Yes pilot stays lit
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    21
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    1,902

    Modine unit heater?

    Working on Modine u/h today m/n PA300A, with standing pilot. On a call for heat the unit fires but as soon as the fan kicks on the gas valve looses power and I loose flame. Any after fan shuts...
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    11
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    2,083

    It was a reliatel board, because I was able to...

    It was a reliatel board, because I was able to wire honeywell stat to board useing y,w,g etc and have control of rtu, not sure why the trane baystat would not work(tried two), wired exactly the same...
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    11
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    2,083

    Not sure what BAS is but harness was connected...

    Not sure what BAS is but harness was connected from comm board to j4 plug on rtrm and another harness from blower section was run to comm unit. I took off comm to rtrm harness and plugged in harness...
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    11
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    2,083

    A wireing harness on comm board was connected to...

    A wireing harness on comm board was connected to rtrm board, I removed harness and was able to control rtu from t-stat.
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    2,083

    A trane stat to begin with, It has a Baysen...

    A trane stat to begin with, It has a Baysen number I believe, not sure exactly what a Baysen stat is, but it was wired by others in the same fashion as a conventional stat, what I do know is that is...
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    2,083

    Trane rtu won't run from stat

    Working on a trane rtu YSCO60E3. I can jump out for heat at unit with test 1 test 2 but no control from stat It's a trane stat and I tried a Honeywell stat i had which I know works and same result. ...
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    997

    Well it turns out it is the ignition board at...

    Well it turns out it is the ignition board at fault. Had another 5 ton up top and tried that board and unit fired. Thanks again
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    997

    That's right 5 flashes. Unit was installed in...

    That's right 5 flashes. Unit was installed in summer by others and gas valve was off so I suspect it's never been run on heat, I will check ground and flame rod but I expect that wil be like new....
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    4
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    997

    Trane rtu flame w/o gas valve error

    Working on a trane ysc060e rtu I get an error flame w/o gas valve error as soon as I power unit. Ventor motor starts when unit powered and it goes straight to this error . Should there be a trial...
  16. Replies
    16
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    1,477

    Heat exchanger changed in August, baffles included

    Heat exchanger changed in August, baffles included
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    16
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    1,477

    The pilot tube had been removed and cleaned. You...

    The pilot tube had been removed and cleaned. You can see pilot flame along bottom of tubing, but peeters out when it hits top tubing(u bend) and doesn't seem to hit sensor to open main gas, until...
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    16
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    1,477

    Yes. They were all missing ang found replacements

    Yes. They were all missing ang found replacements
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    1,477

    carrier burner lights sometimes

    Carrier 48dje064ca package unit with 3 burners. Gas pressures ok, pilot tubbing cleaned but, one burner (first stage) will only ignite when I hold hand over exhaust vent. Other burners run, same type...
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    850

    Lennox GCS11 blower runs all the time

    Working on older Lennox RTU where the blower runs all the time when it should not, unit controlled by 20vdc stat. Struggled with this unit for a while today, came down to finding a cmc2 blower delay...
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    19
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    2,928

    Changed cap ,motor hummed, gave blower spin to...

    Changed cap ,motor hummed, gave blower spin to get going, noisy as hell, berrings are shot, going to replace motor. Thanks all for help.
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    2,928

    Okay thanks, and agrred I do need to get some...

    Okay thanks, and agrred I do need to get some more van stock.
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    2,928

    Capacitor check on furnace.

    I had looked at furnace with run cap for blower, unit was off on high limit. Did cap test and had 1.2 micro farads(cap rated for 5mfd) Cap wasnt bulged but my question is at 1.2 can I assume cap is...
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    1,485

    Thanks asjc, that information really helped. ...

    Thanks asjc, that information really helped.

    2sac, the stats are checked on pm's, but initially when on rooftop, units are jumped out ot test operation. Thanks all for your help.
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    1,485

    Jumping out Lennox gcs11 953 250

    Doing pm on rtu's. I came across 4 older Lennox rtu's gcs11. Not sure how to jump these out. From the looks of it dc voltage is run into a control panel and then over to another panel in comp...
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