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Old 10-16-2010, 01:32 PM   #1
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Gas furnace running but no hot air


HI
we have a gas furnace, on the thermostat it shows as the furnace is on and running but there is no hot air. the temperature has dropped. It was working well and suddenly it stopped in the morning. Our furnace is almost 10 yrs old now.Anybody can tell me what might be wrong. Is there anything that i can check before calling someone, would be nice if I don't have to call anyone-- its really expensive. Thank u all in advance.

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Old 10-16-2010, 01:43 PM   #2
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Gas furnace running but no hot air


It it has a control board . See if it has a small light. If it blinks count the blinks . look on the back of the blower panel & see what the code is

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Old 10-17-2010, 01:53 PM   #3
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Gas furnace running but no hot air


it says normal operation -- when heating demand initiated at the thermostat
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Old 10-17-2010, 03:08 PM   #4
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Gas furnace running but no hot air


If it has HSI check to see if it's glowing red to ignite the gas.
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Old 10-18-2010, 05:54 AM   #5
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Gas furnace running but no hot air


yes it is
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Old 10-18-2010, 08:08 AM   #6
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Gas furnace running but no hot air


Natural gas or LP? If LP, is there fuel in the tank? I did a service call once that all it needed was a refill of the LP tank.
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Old 10-18-2010, 09:23 AM   #7
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Gas furnace running but no hot air


Its natural gas
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Old 10-18-2010, 10:21 AM   #8
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Gas furnace running but no hot air


check limits, ps, 24 v at gv
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Old 10-20-2010, 09:45 AM   #9
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Gas furnace running but no hot air


thanks I had it done with somebody cos it was getting really cold at home

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