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I have a AC/ natural gas furnace combination unit all

Customer Question
enclosed in one big unit...
I have a AC/ natural gas furnace combination unit all enclosed in one big unit that sits outside our house. We got a lot of snow overnight and now the heat won't work. The fan is still running but its just circulating cold air. Any ideas on how to get the furnace running again? Thanks
Submitted: 2 years ago.Category: HVAC
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Answered in 2 hours by:
1/23/2016
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,353
Experience: Furnace, A/C and heat pump specialist.
Verified

Let's start by making sure the vent on side of unit is not blocked rt filled with snow.

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Customer reply replied 2 years ago
we've completely cleared all snow on and around the unit.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

1. Give me complete model on unit

2. Tell me exactly what if anything happens on call for heat

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Customer reply replied 2 years ago
It's model 48GS-042090301 serial 3501G13220.The fan is running and circulating cool air but the heat is kicking on at all
Customer reply replied 2 years ago
It's blinking 7 times
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Sorry had to reboot computer.let me get my manual opened back up.

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Customer reply replied 2 years ago
It's saying that means a rollout switch fault
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Thanks for your patience. The 7 flash code indicates a flame rollout switch is tripped. Look just above burners for small rollout switches with 2 wires attached and small red button in between wires, Push those buttons and lets see if they will reset.

http://i.imgur.com/CGkB9sa.jpg

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Customer reply replied 2 years ago
I don't immediately see the burners. Any idea where they might be located in relation to the red flashing light?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Looks like someone may have replaced with wrong switch.These should have a reset button as shown earlier.Also looks like one may already be bypassed .Picture gets a bit blurry when I enlarge so I cant really tell on it.

For a test to see if code will o awy and burners light, unplug and connect the blue wires to this switch.

http://i.imgur.com/WqmGzzO.png

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