Tempstar DC90 gas furnace dosn't light but fan comes on.

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Old 11-07-11, 04:51 AM
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Tempstar DC90 gas furnace dosn't light but fan comes on.

Hi I have a Tempstar DC90 Ultra High Efficiency gas furnace it dosn't light but fan comes on. The electronic igniter sometimes comes and sometimes dosn't. The gas valve sometimes clicks, but dosen't light please help.
 
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Old 11-07-11, 05:19 AM
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This your first start of the season?

Make sure the valve on the gas line is open.

Make sure the gas valve is set to "ON".
 
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Old 11-08-11, 03:57 AM
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The gas is on. and the gas valve is on.[/FONT]
 
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Old 11-08-11, 05:39 AM
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Then you are going to need to use a meter to see if you are getting power to the gas valve.
 
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Old 11-08-11, 05:52 AM
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I' m pretty sure it has electric going to it I can hear it clicking
 
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Old 11-08-11, 05:57 AM
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The electronic ignitor also comes on sometimes
 
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Old 11-08-11, 05:58 AM
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Going to need to use a meter to see if power staying on the whole time on a call of heat.

If the power is dropping, then you have to trace back and see what cutting the power.


If the power is staying on the whole time, then you may have a bad gas valve.
 
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Old 11-08-11, 02:25 PM
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I'd start by carefully observing the sequence of things that happen when you turn up the thermostat and reporting that sequence here.
 
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