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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I removed the plates from my thermostat to see if my system

Customer Question

I removed the plates from my thermostat to see if my system is compatible with a Nest smart thermostat. Now I have no heat downstairs, so I screwed something up! There is something that looks like a fuse that I was hoping I could change easily myself
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: It is not a digital system. I didn't see the filters, only messed with what is on the wall
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: I don't think so
Submitted: 8 months ago.
Category: HVAC
Expert:  gotoman for ac replied 8 months ago.

If you did not turn power off to system you may have blown a fuse. If this is a gas furnace open the blower compartment below the burners and check the furnace board. It should have a auto type fuse on the board. It will be a 3 and or amp fuse. Russ

Expert:  gotoman for ac replied 8 months ago.

If you can not find it give me model number of furnace. Russ

Customer: replied 8 months ago.
I can't find it, it is gas, but with an integrated hot water system. The furnace is a Laars Endurance, model number: EBP0110NAIF2AX
Expert:  gotoman for ac replied 8 months ago.

Do you still have lights on furnace. There is a five amp fuse inside top panel. Russ

Customer: replied 8 months ago.
We still have heat in the upstairs zone. The digital readout is on. I am working on getting the panel open, I really don't want to lose my upstairs heat!
Expert:  gotoman for ac replied 8 months ago.

You may be ok on fuse. How many wires to thermostat

Customer: replied 8 months ago.
2 one white that connects to 4, and one red that goes to R5
Customer: replied 8 months ago.
I found the fuse, but there is only one so I don't think that is the problem. There is something that looks like a small fuse in the thermostat.
Expert:  gotoman for ac replied 8 months ago.

On thermostat can you place a jumper across wires to see if heat works. Russ

Customer: replied 8 months ago.
if you can tell me what that means!
Expert:  gotoman for ac replied 8 months ago.

When you remove front of thermostat. You have two wires on thermostat correct. Take a wire and touch between the two terminals and see if heat responds.

Customer: replied 8 months ago.
I will look to see if we have any wire
Expert:  gotoman for ac replied 8 months ago.

Ok I will be online for about 1 hour if I leave I will turn you over to another Expert.

Customer: replied 8 months ago.
All I have is a paperclip! both ends spark, but I am not getting a reaction from the heat
Expert:  gotoman for ac replied 8 months ago.

Does the other heat zones work. Russ

Customer: replied 8 months ago.
Expert:  gotoman for ac replied 8 months ago.

I am going to output and turn you over to another Expert.

Customer: replied 8 months ago.
ok thanks
Customer: replied 8 months ago.
is anyone there?