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BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22310
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have a lennox g61v furnace. the fan is running but i get

Customer Question

i have a lennox g61v furnace. the fan is running but i get no heat.
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: we put in a new thermostat and it has a new filter
JA: Do you plan on doing the work yourself?
Customer: we cannot get someone to come out until tomorrow. i thought maybe i could check a few things myself
JA: Anything else we should know to help you best?
Customer: how could i check codes
Submitted: 4 months ago.
Category: HVAC
Expert:  BillyHvac replied 4 months ago.

Hello,

My name is ***** ***** I will do my best to assist you. I am looking over your question now and will respond shortly.

Expert:  BillyHvac replied 4 months ago.

Did this start after you changed thermostat or before?

Also here is a manual with code information at the back

Lennox G61 Manual

Customer: replied 4 months ago.
how do you check codes on the furnace
Expert:  BillyHvac replied 4 months ago.

It explains on page 91 of the manual I sent you plus it tells you what all the codes are.

Did this happen before or after the thermostat change?

Customer: replied 4 months ago.
Before
Expert:  BillyHvac replied 4 months ago.

ok, if you tell me what the lights are doing..or you can look in manual and

i can tell you what happened

Customer: replied 4 months ago.
I took off the upper access panel but I don't see the led lights. Are they in the bottom access
Expert:  BillyHvac replied 4 months ago.

Bottom section with blower.

There will be 2 lights. There may be a pop out safety that cuts power that would need to be held in or taped down

Customer: replied 4 months ago.
I took the panel off but I don't see any lights
Expert:  BillyHvac replied 4 months ago.

you will need to hold the door switch in. The lights are on the circuit board where all the wires go

see here

Customer: replied 4 months ago.
I see two green lights and a red light for status
Expert:  BillyHvac replied 4 months ago.

Thank you.

And what pattern are they blinking? The ones we want are labeld ds1 and ds2

Customer: replied 4 months ago.
I don't see where there labeled
Expert:  BillyHvac replied 4 months ago.

what are the lights doing as far as flashes

Customer: replied 4 months ago.
Speed light is steady green cfm is slowly blinking green and status is blinking three red and then one red
Expert:  BillyHvac replied 4 months ago.

Thank you.

Was the filter plugged?

Customer: replied 4 months ago.
It was dirty when I changed it
Expert:  BillyHvac replied 4 months ago.

But this issue started before filter change?

Expert:  BillyHvac replied 4 months ago.

I think we tripped a high heat safety because of filter plugged..and when it cooled it did not return closed.

See this HERE

A credit card sized flat plate in upper section against back wall with 2 wires...tell me when you find this

Customer: replied 4 months ago.
I don't see this plate.
Customer: replied 4 months ago.
I think I found it
Expert:  BillyHvac replied 4 months ago.

size of credit card...sits flat against the back wall?

Customer: replied 4 months ago.
Expert:  BillyHvac replied 4 months ago.

turn power off to furnace...tap that plate 3-4 times...

Turn power back on and tell me code

Customer: replied 4 months ago.
T
Customer: replied 4 months ago.
Speed is green cfm is blinking green status is still blinking three red and then one red
Expert:  BillyHvac replied 4 months ago.

thank you.

It appears you need a new limit switch or another switch in the series has been tripped. I am afraid it is at the point where you will need to call for service. A Lennox dealer will have the right parts on truck