Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-14-2013, 05:15 PM   #16
Member
 
Join Date: Jul 2013
Location: Texas
Posts: 110
Rewards Points: 0
Share |
Default

Heat tripping breaker


Your problem probably lies with the part of the electric strip that you can't see without removing it. Here is a photo of a typical heat strip. The coils can touch each other and short out causing the circuit breaker to trip. The photo shows what is involved as far as which part would be replaced. Replacement strips are readily available and less costly than a lot of manufacturers. Due to 240V being involved, it can be extremely dangerous/deadly if you don't know what you are doing.
Attached Thumbnails
Heat tripping breaker-goodmanheatingstrip.jpg  


Last edited by firedawgsatx; 10-14-2013 at 05:20 PM.
firedawgsatx is online now   Reply With Quote
The Following User Says Thank You to firedawgsatx For This Useful Post:
beenthere (10-14-2013)
Old 10-14-2013, 06:40 PM   #17
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 25,056
Rewards Points: 0
Default

Heat tripping breaker


Quote:
Originally Posted by Shadetree99 View Post
Sorry for the delay. I have since replaced the thermostat. Heat strips are still receiving current in cool mode. Do you think it circuit board or transformer in the pic causing the issue?

If everything is wired correctly, and working correctly. You will still read voltage with the way that you have that meter connected.

Disconnect all low voltage wires from the control board, and see if the heaters still come on then.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is offline   Reply With Quote
Old 10-14-2013, 07:17 PM   #18
Member
 
Join Date: Jul 2013
Location: Texas
Posts: 110
Rewards Points: 0
Default

Heat tripping breaker


Disregard my last post. I failed to notice there were two different posters on the same thread.
firedawgsatx is online now   Reply With Quote
The Following User Says Thank You to firedawgsatx For This Useful Post:
Shadetree99 (10-18-2013)
Old 10-18-2013, 07:49 AM   #19
mechanic by trade
 
Join Date: Jul 2013
Posts: 6
Rewards Points: 0
Default

Heat tripping breaker


First let me say THANKS to you both for trying to help. This unit belongs to my sister and I am just trying to help her out.

beenthere: Please help me understand. The original issue was the heat strips are receiving power while in cool mode. Based on your response I am drawing the following conclusions:
1. The thermo change could have fixed the issue.
2. The circuit controls the ground to the strips and not the positive.
3. I could check both leads to a strip for closed circuit test.
4. If I still have closed circuit to strip, disconnect low volt circuits from board to test for board failure?

Thanks a million !!
Shadetree99 is offline   Reply With Quote
Old 10-18-2013, 04:44 PM   #20
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 25,056
Rewards Points: 0
Default

Heat tripping breaker


Quote:
Originally Posted by Shadetree99 View Post
First let me say THANKS to you both for trying to help. This unit belongs to my sister and I am just trying to help her out.

beenthere: Please help me understand. The original issue was the heat strips are receiving power while in cool mode. Based on your response I am drawing the following conclusions:
1. The thermo change could have fixed the issue.

Yes.

2. The circuit controls the ground to the strips and not the positive.

There is no ground to the strips themselves. They are 208/230/240 volt, so no ground connected to them.

3. I could check both leads to a strip for closed circuit test.

Best to do an amp draw check, on both sides of the element. Even when energized, you will read full line voltage across the strip as it is a load.

4. If I still have closed circuit to strip, disconnect low volt circuits from board to test for board failure?

Thanks a million !!
Yes, next step is to disconnect low voltage control wires and see if the strip is still being energized. If so, the sequence/delay board may have its contacts burnt closed.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is offline   Reply With Quote
Old 10-21-2013, 09:16 PM   #21
mechanic by trade
 
Join Date: Jul 2013
Posts: 6
Rewards Points: 0
Default

Heat tripping breaker


I reconnected everything and the heat strips still have constant current. When I disconnected the low voltage circuit from the strips (See Connector unplugged) The strips remained energized. Could the issue be the relays I have marked in the picture? It is the only thing I see that could energize the strips. I am thinking the overheat protector in the top of the picture might be bad as well. Your thoughts?

Thanks.
Attached Thumbnails
Heat tripping breaker-ac-pic-2.jpg  
Shadetree99 is offline   Reply With Quote
Old 10-22-2013, 04:36 AM   #22
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 25,056
Rewards Points: 0
Default

Heat tripping breaker


The middle relays could be stuck/burnt fast.

When you check to see if they are still energized. You are reading 240 volts on them, and not just checking from one end of the strip to ground, correct.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is offline   Reply With Quote
Old 10-22-2013, 05:21 AM   #23
Member
 
Join Date: Oct 2010
Location: Cairns Australia
Posts: 2,494
Rewards Points: 0
Default

Heat tripping breaker


Can you post a picture of the wiring diagram ?
We need to be sure that your reading the voltage in the right way.
What voltage are the heat strips,
And how are they controlled,
You said that they switch the neutral line,
If there on 240v then there is NO neutral.
Only two hots !

Need to see the wiring diagram to be sure !
And YES relays can stick in the on position.
dmxtothemax is offline   Reply With Quote
Old 10-23-2013, 02:13 AM   #24
Member
 
Join Date: Mar 2007
Location: Eighty Four, Pa.15330
Posts: 1,248
Rewards Points: 0
Default

Heat tripping breaker


Howzabout the o/b setting on t'stat?
bobelectric is offline   Reply With Quote
Old 11-06-2013, 07:06 AM   #25
mechanic by trade
 
Join Date: Jul 2013
Posts: 6
Rewards Points: 0
Default

Heat tripping breaker


Just wanted to post a resolution and a HUGE THANKS to all who chimed in here. Your collaborative efforts led me to follow logic and find the issue and I have gained valuable knowledge. It turned out to be the top relay in the center of the above pic. It was fused and allowing constant current to the heat strips. Thanks again to all. My sister thanks you since she now has heat ! I hope this thread will one day help someone else to a quicker resolution.


Last edited by Shadetree99; 11-06-2013 at 07:11 AM.
Shadetree99 is offline   Reply With Quote
The Following User Says Thank You to Shadetree99 For This Useful Post:
beenthere (11-07-2013)
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Heil Electric furnace tripping breaker chrishosley HVAC 31 02-26-2013 06:35 PM
Heatpump vs Natural Gas - Energy Cost Spreadsheet zootjeff HVAC 8 11-19-2011 10:45 PM
How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use? twilightcall HVAC 34 12-28-2010 06:53 PM
HW tank breaker tripping arichard21 Electrical 6 10-31-2007 04:13 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.