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My package unit Heat isn't turning on

Customer Question
My package unit Heat isn't turning on
Submitted: 1 year ago.Category: HVAC
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Answered in 40 minutes by:
10/23/2016
HVAC Technician: airheatman, HVAC Technician replied 1 year ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,528
Experience: Furnace, A/C and heat pump specialist.
Verified

Are you able to do some troubleshooting.What is model number?

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Customer reply replied 1 year ago
Ok. Let me get that
Customer reply replied 1 year ago
Trane unit 4ycc3036a1075ab
Customer reply replied 1 year ago
Thermostat is on heat setting 75. Inside home is 65. Says "on" but no fan blows any warm air.
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK can you open the service panel on unit and see if we have a control board with a flashing light? If o what is flash pattern?

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Customer reply replied 1 year ago
I can do that
Customer reply replied 1 year ago
I've got a flashing green light
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

What is pattern? how many blinks between pause or just a steady flash?

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Customer reply replied 1 year ago
No pattern. Just blink. Pause. Blink
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK do this. Touch the R and W terminal together where wires from thermostat hook to board. Juse a jumper or a pair of needle nose or anything.Tell me if the small vent fan comes on and hoe far in sequence unit will go.

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

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Customer reply replied 1 year ago
It turned on
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK that tells us issue is not with unit but with not getting signal from thermostat. Lets replace batteries in thermostat if you haven't already.

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Customer reply replied 1 year ago
New batteries are in. But heat doesn't seem to be turning on
Customer reply replied 1 year ago
I can turn the thermostat to fan. And it blows air. But nothing when on heat
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK lets do this. JUmp the red and white wires together at the thermostat just as we did in unit and see if it comes on.

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HVAC Technician: airheatman, HVAC Technician replied 1 year ago

R and W

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Customer reply replied 1 year ago
No it does not
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK but it did when you jumped R and W at furnace board, right?

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HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK that means there has to be a break in the wire somewhere between the theromostat and unit.

Can you trace the wire and see if perhaps there is a splice somewhere and the white wire has come loose?

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Customer reply replied 1 year ago
I'll do that
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Also verify you did touch the wires themselves together R and W

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Customer reply replied 1 year ago
There is some old wiring under there. Spliced with new wire. Since we have a newer unit. I didn't find any breaks in the line. Checked the splices and everything looks fine.
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Do you have a meter to check continuity with?

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Customer reply replied 1 year ago
I have a Milwaukee clamp meter. Never checked continuity with it before
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Does it have leads?

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Customer reply replied 1 year ago
I have meter and it is set to check continutity
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Take R and W loose at either thermsoatat or unit and twist them together and go to the other end unit or thermostat and see if we have continuity

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Customer reply replied 1 year ago
One step a head of you. I just did that. No continuity
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK has to be a break.You will either have to find it or run a new wire

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Customer reply replied 1 year ago
Ok. I will run a new wire to replace the old wire
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

That should fix you up.

If you have further questions, please let me know.

Thanks for letting me work with you.If my answer has been polite, professional,and thorough, please click one of the ratings before you go. If you still need help let me know!.Expert is not paid for assisting you until you rate answer.Feel free to follow up for 30 days at no additional cost. Bonus always appreciated if you feel justified.

To rate answer, please select one of the stars on the page.

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Customer reply replied 1 year ago
Thank you
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

JUst let me know if you have any more problems. I am only paid when you rate answer so please remember to do so before you go.You can still follow up for 30 days after rating at no cost

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Customer reply replied 1 year ago
Ok. Where do I rate?
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

You should see some starts across sceren to select rating

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airheatman
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Experience: Furnace, A/C and heat pump specialist.

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