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Old 12-09-2008, 10:10 AM   #1
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Carrier 58RAV Continuous On


I recently changed out an igniter unit for my Carrier 58RAV. The Furnace is coupled with a Honeywell digital Thermostat.

Upon going through the restart of the furnace I got:

-Continuous "On" LED status implies "Control has 24VAC power"
-Furnace Blows heat constantly (not cycling) regardless of the setting of the Program OR Hold temperature setting displayed on the Thermostat.

I've replaced the batteries at the Thermostat with no affect.

The service manual does not give me a "next step" or troubleshooting fix for this problem.

Any help would be greatly appreciated. I will send the post that best helps me resolve this situation a thank you gift (that is no charge) of one of my company's award winning Lighted Umbrellas.
thanks so much.


Last edited by yanosan; 12-09-2008 at 10:28 AM. Reason: to remove the link to my website (I don't want folks getting the idea that I'm advertising)
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Old 12-09-2008, 11:03 AM   #2
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Carrier 58RAV Continuous On


Is the furnace heating (burners on) or just blowing air? Does the furnace still run with the thermostat switched off and the fan set to auto? Could be that the thermostat wires are shorted together. Was the thermostat bypassed on the circuit board to test the ignitor and the jumper left on?

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Old 12-09-2008, 12:17 PM   #3
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Carrier 58RAV Continuous On


furnace IS blowing hot air...constantly.

thermostat is off.

thermostat was NOT bypassed for re-ignite
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