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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a Heil gas furnace...G9mve and honeywell

Customer Question

I have a Heil gas furnace...G9mve and honeywell thermostat...rthl3550
JA: Did you double-check the thermostat? And what about the pilot light?
Customer: cant get the ac to come on
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: i have 5 wires to thermostat
Submitted: 1 year ago.
Category: HVAC
Expert:  Phil replied 1 year ago.

Hello, had you just replaced the thermostat? if so, tell me which color wires were connected to which terminals on the OLD thermostat, and which color wires are now connected to which terminals on the new thermostat... if that's not the case tell me in detail when this problem began and a lot about your technical skill sets so that I can coach you most effectively.

Customer: replied 1 year ago.
its all on thermostat red with jumper...yellow on yellow...white on on on w2
Ive put it a few furnaces...but not a Heil...i had the heat going over the winter but never got the green light to come on
Customer: replied 1 year ago.
Expert:  Phil replied 1 year ago.

Thanks, ***** ***** incorrectly, but I need to see a close up, exceedingly well focused photo of the wiring diagram glued to the inside the same compartment door that covers the printed circuit card

There are also dip switch settings that need to be set (page 24)

We can go from there.

Customer: replied 1 year ago.
ill get over there tomorrow and send it to you...thanks
Expert:  Phil replied 1 year ago.

Great. I will be here

Expert:  Phil replied 1 year ago.

If you get zero voltage readings between R and C check fuse just below that terminal strip with a 3 or an E on it

If the fuse is blown replace with a 3 amp automotive type fuse.

Leave the blue disconnected on both ends.

We can go from there

Customer: replied 1 year ago.
Hi Phil
The 3amp fuse was blown...and I got 24 volts between the posts
I attached the diagrams
Customer: replied 1 year ago.
I just now seen your photo from my computer the test you didn't come up on my phone.
I test it tomorrow