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My thermostat is blank, My furnace was working but no heat.

Customer Question
My thermostat is blank JA: Thanks...
My thermostat is blank
JA: Thanks. Can you give me any more details about your issue?
Customer: My furnace was working but no heat. I diagnosed the problem as a bad surface igniter I replaced the igniter but when I did I noticed the thermostat had gone blank
JA: OK got it. Last thing — HVAC Technicians generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.Category: HVAC
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Answered in 2 minutes by:
3/13/2016
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 22,373
Experience: 40+ yrs. experience as a licensed oil & gas technician.
Verified

What is the brand and model number of your furnace?

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Customer reply replied 1 year ago
It's a good man
GMT 7070-3b
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Ok, what do you have a an LED blink sequence on the control board?

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Customer reply replied 1 year ago
Does that help?
Customer reply replied 1 year ago
I don't know what an led blink sequence is
Customer reply replied 1 year ago
Everything worked fine except no heat. I replaced the igniter now nothing works with the thermostat
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

You have to go to the furnace and look through the peep hole in the blower compartment panel and tell me how many times does the LED blink before it pauses and repeats

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Customer reply replied 1 year ago
It doesnt
Customer reply replied 1 year ago
No light or blinking
Customer reply replied 1 year ago
I have the cover fully removed
Customer reply replied 1 year ago
Not seeing a light
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

There is no power to the unit if you remove the blower panel. You have to put it back so the blower panel switch is pushed in held in by the panel being properly in place

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Customer reply replied 1 year ago
Ok let me try that
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Ok

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Customer reply replied 1 year ago
Ok back
Customer reply replied 1 year ago
Got disconnected be its pretty hard to type on an iPad in my attic
Customer reply replied 1 year ago
Still there?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

So what happens? still have a blank thermostat?

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Customer reply replied 1 year ago
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

I'm not available for a call and there is an additional charge for a call

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Customer reply replied 1 year ago
Ok I can keep typing if you don't have a cell phone
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

We can continue here if you like.

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Customer reply replied 1 year ago
What do you need to know?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

What is the LED doing?

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Customer reply replied 1 year ago
Just a red light no blinking
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Is it on solid? blinking?

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Customer reply replied 1 year ago
Solid
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Is the thermostat calling for heat?

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Customer reply replied 1 year ago
Thermostat is blank. That's why I'm calling you
Customer reply replied 1 year ago
I have no idea what it's calling for
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Have you checked since you put the panel back? Is anything running? the small draft fan on the front?

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Customer reply replied 1 year ago
Yeah the furnace started running when I put the panel back on
Customer reply replied 1 year ago
Thermostat still blank
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Ok, I don't have the time to finish this. I have to leave shortly. I'm going to open this up to my colleagues so one of them can help. Please don't respond (even to acknowledge this post)until you get a response from us. If you respond first it will only delay your answer.

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Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
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Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

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