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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Replaced non programmable with programmable. Turned furnace

Customer Question

Replaced non programmable with programmable. Turned furnace power back on but furnace soesnt run. Replaced old thermostat to original wiring but furnace still doesn't run?
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: Thermostat wired as coded and same for old one which worked fine. Reset button to restart furnace after power restored?
JA: Do you plan on doing the work yourself?
Customer: Yes if easy
JA: Anything else we should know to help you best?
Customer: Hopefully matched color coded wires corectly in process.
Submitted: 1 month ago.
Category: HVAC
Expert:  BillyHvac replied 1 month ago.

hello,

My name is Billy. Do you still need help?

Customer: replied 1 month ago.
Furnace still not running!
Expert:  BillyHvac replied 1 month ago.

can you tell me the furnace make and model number?

and was furnace turned off before you changed wiring?

Customer: replied 1 month ago.
Reset button to start up furnace once the power has been restored? Rheem/Ruud RCF2417STAMC model.
Expert:  BillyHvac replied 1 month ago.

that looks like an air condition coil number. I need the furnace

Customer: replied 1 month ago.
Any response to question?
Expert:  BillyHvac replied 1 month ago.

I answered....you gave a ac coil number not a furnace number...I need the furnace model before I can answer...I also asked if the furnace was turned off before wiring.

Customer: replied 1 month ago.
Furnace turned off before any wire changes. Looking for a different model number.
Customer: replied 1 month ago.
new home, new furnace. All I can find is 95T and 95SMX series
Expert:  BillyHvac replied 1 month ago.

thank you, ***** ***** please remove the top and bottom door?...I am going to send you a pic of what we need to do

Customer: replied 1 month ago.
Doors have been taken off.
Expert:  BillyHvac replied 1 month ago.

great...now the furnace...does it say Rheem, Ruud or Bryant on the the front?

Customer: replied 1 month ago.
ruud
Expert:  BillyHvac replied 1 month ago.

Thank you

in the bottom is a circuit board on the front of the blower...do you see this board?

Customer: replied 1 month ago.
Expert:  BillyHvac replied 1 month ago.

there is a 3 amp fuse on the board see HERE

Expert:  BillyHvac replied 1 month ago.

we need to see if that fuse is blown. It is purple with a 3 on it...looks like a car fuse

Customer: replied 1 month ago.
Expert:  BillyHvac replied 1 month ago.

Is it blown?

Customer: replied 1 month ago.
looks fine?
Expert:  BillyHvac replied 1 month ago.

Looking in the side window of the fuse...is the tiny element intact? or can you post a pic?

Customer: replied 1 month ago.
still good
Expert:  BillyHvac replied 1 month ago.

thank you,

now put fuse back in...tap down the pop out door switch that pops out when the bottom door is removed.

Then turn power on and tell me what the light on the circuit board does

Expert:  BillyHvac replied 1 month ago.

there should be a code flashed in a window

Customer: replied 1 month ago.
No light on circuit board?
Expert:  BillyHvac replied 1 month ago.

If no light...

is the pop out switch taped down right now...see here

Customer: replied 1 month ago.
No, I can push it in and hear a slight humming sound
Expert:  BillyHvac replied 1 month ago.

tape it down...

Customer: replied 1 month ago.
done
Expert:  BillyHvac replied 1 month ago.

now with thermostat to heat and turned up does anything light up on board

Customer: replied 1 month ago.
No light
Expert:  BillyHvac replied 1 month ago.

Then the issue is with that fuse or with the furnace transformer.

Here is just a sample of what happens on the board if trouble...see here

Either that fuse is indeed bad or the transformer...I will opt out to the others to have look also.

Customer: replied 1 month ago.
Thanks, ***** ***** look elsewhere. I can follow up with what I find when it is corrected. Sorry to waste our time.
Expert:  airheatman replied 1 month ago.

We would need a meter to troubleshoot. If you have a meter let me know .If not you can get an inexpensive one at Walmart for about 15 bucks if you would like to troubleshoot and I would be happy to guide you.

http://www.walmart.com/ip/Innova-3300-Equus-3300-Hands-free-Digital-Multimeter/14644665

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