roof top heater/gas furnace

12-20-2012, 04:32 PM	#1
jautery Newbie   Join Date: Dec 2012 Posts: 1	roof top heater/gas furnace hello I thank and appreciate the help my heater just stopped working one day and noticed that the air filter was bad, after replacing it i pushed the reset button ,t but to no luck.. all it makes is a humming noise..

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12-20-2012, 05:16 PM	#2
DIY_user Newbie   Join Date: Nov 2006 Posts: 17	roof top heater/gas furnace Can you be a litlle more specific what heater or furnance are you using ? If it is electric heater, a blocked filter can cause overheating and damage something if the overheat protection switch is not working. A gas furnance may not have the same result with the blocked filter.

12-21-2012, 08:23 AM	#3
oncall Newbie   Join Date: Dec 2012 Location: Pittsburgh, PA Posts: 25	roof top heater/gas furnace Does the humming sound seem to be coming from the blower assembly? If Gas furnace Do the burners light? If Gas furnace do you have a sprak ignition, hot surface (Glow coil) ignition, or standing pilot? The people on this forum who can help will need some more information.