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-   -   Gas furnace running but no hot air (http://www.diychatroom.com/f17/gas-furnace-running-but-no-hot-air-84086/)

newone 10-16-2010 02:32 PM

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.

kenmac 10-16-2010 02:43 PM

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

newone 10-17-2010 02:53 PM

it says normal operation -- when heating demand initiated at the thermostat

kenmac 10-17-2010 04:08 PM

If it has HSI check to see if it's glowing red to ignite the gas.

newone 10-18-2010 06:54 AM

yes it is

SD515 10-18-2010 09:08 AM

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.

newone 10-18-2010 10:23 AM

Its natural gas

kenmac 10-18-2010 11:21 AM

check limits, ps, 24 v at gv

newone 10-20-2010 10:45 AM

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


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