Author Topic: Carrier electric heat  (Read 9502 times)

Offline jdman

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Re: Carrier electric heat
« Reply #10 on: October 12, 2008, 08:10:00 AM »
PS I do hear a click at the thermostat when I click the fan to on

Offline Repair-man

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Re: Carrier electric heat
« Reply #11 on: October 12, 2008, 08:23:06 AM »
Ok, so if you hear a click then the fan relay is likely operating. It is now a question of voltage coming from the board to the blower motor. Had the board been wired properly and the output was 240 volts between BLK and COM on the fan leads, then all would work.

Some of these units have more than one circuit breaker depending on the Kw output of the heat strips.
« Last Edit: October 12, 2008, 08:25:47 AM by Repair-man »
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Offline jdman

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Re: Carrier electric heat
« Reply #12 on: October 12, 2008, 08:36:12 AM »
I do not hear the relay clicking but a click at the thermostat

Offline jdman

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Re: Carrier electric heat
« Reply #13 on: October 12, 2008, 08:42:43 AM »
Another thing I should add is the C is not connected at the thermostat as it is battery operated

Offline Repair-man

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Re: Carrier electric heat
« Reply #14 on: October 12, 2008, 08:56:51 AM »
Depending on the thermostat, the clicking is the internal  fan relay on the thermostat board.

Tell you what I always do anyway... open the thermostat and disconnect the G wire and place it directly on the R terminal along with the red wire. This will guarantee that the 24 volts is being sent to the upstair air handler. Then go up there and find out  what happens. I would expect to find the  air handler supplying  power to the fan motor at this point.
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Offline JWWebster

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Re: Carrier electric heat
« Reply #15 on: October 12, 2008, 02:13:42 PM »
You also need to read the instructions that come with the thermostat. Most of them do both gas and electric furnaces. Most all of them come set up for gas heat. You must move a wire on the thermostat for the fan to come on if you have electric heat. Did you?
« Last Edit: October 12, 2008, 02:15:27 PM by JWWebster »
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Offline jdman

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Re: Carrier electric heat
« Reply #16 on: October 12, 2008, 03:42:52 PM »
Yes it is set for electric and programed per instructions

Offline JWWebster

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Re: Carrier electric heat
« Reply #17 on: October 12, 2008, 06:54:09 PM »
I do not understand why the fan will not come on unless the motor is bad.
have you checked it for continuity between white(common) and any of the 3 speeds:
 black/hi  blue/med  red/lo?
« Last Edit: October 12, 2008, 06:56:08 PM by JWWebster »
May the hinges of our friendship
        never grow rusty.

About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.
I love fan letters! LOL

Offline jdman

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Re: Carrier electric heat
« Reply #18 on: October 17, 2008, 09:25:11 PM »
Motor is good. 240V into the board and 24V from C-G. Relay on board does not click nor does 240V come to the fan. Replaced board with another and problem still exist. I'm to the point of removing the board and just wiring up to a fan relay.

Offline JWWebster

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Re: Carrier electric heat
« Reply #19 on: October 17, 2008, 10:07:51 PM »
why do you need a dang board to run electric heat?
A sequencer will do the job with 24 volts.
May the hinges of our friendship
        never grow rusty.

About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.
I love fan letters! LOL

 

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