trane ycc030f won't heat


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Old 10-17-09, 01:50 PM
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trane ycc030f won't heat

I have a trane ycc030f will not start up heat. First code led 3, pressure switch problems. Bypassed pressure switch get code led 4, high limit switch open. It's getting cold and I would like to get this figured out. Any help would be appreciated.
 
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Old 10-17-09, 02:11 PM
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Is your induced draft motor running?
Do you feel air coming out of the square vent outlet? (highlighted red)


I've seen the blower wheel of inducers come apart on many package units before.

A nest in the vent could also cause this.

 

Last edited by Houston204; 10-17-09 at 02:27 PM. Reason: Added pic
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Old 10-17-09, 02:42 PM
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The draft motor is not running. I'm assuming that there is a sensor or switch that needs replaced. I already took everything loose and checked for nests. Then I pulled a draw on the pressure switchand the burner kicked on. From all that I gather that the fan starts first, pulls draw on the pressure switch, opens the gas, then the igniter. I could be way off, I'm a mechanic, I know nothing about hvac repair.
 
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Old 10-17-09, 02:52 PM
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Do you have a meter?

Is the inducer getting power?
I see a capacitor in your diagram. Might check that.

Does the inducer squirrel cage spin freely with power removed?
 
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Old 10-17-09, 02:57 PM
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My mistake. No cap on CFM (line 27).
 

Last edited by Houston204; 10-17-09 at 03:44 PM.
 

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