Author Topic: Ruud Furnace ugra-09ezajs  (Read 3715 times)

Offline fullerdan27

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Ruud Furnace ugra-09ezajs
« on: September 21, 2010, 02:04:30 PM »
Issue is keeps poping 3 amp fuse on the bourd. Acoil is clean and so is outside unit. ac works for about 45 mins then blows the fuse. Also new bourd is 2 months old. I know its a 24 volt issue some where. also theremostat is new. any help. would be great

Offline JWWebster

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Re: Ruud Furnace
« Reply #1 on: September 21, 2010, 02:41:51 PM »
Might be thermostat wiring getting brittle?
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Offline jumptrout51

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Re: Ruud Furnace
« Reply #2 on: September 21, 2010, 05:22:42 PM »
What was the issue with the original board?
Take a Kid fishing.

Offline fullerdan27

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Re: Ruud Furnace
« Reply #3 on: September 22, 2010, 08:05:55 AM »
It was doing the same thing witht the old bourd as well

Offline JWWebster

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Re: Ruud Furnace
« Reply #4 on: September 22, 2010, 11:02:12 AM »
Thermostat wire ok?
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 jumptrout51

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Re: Ruud Furnace
« Reply #5 on: September 22, 2010, 03:01:00 PM »
Not many components to verify here.
The transformer,the indoor fan relay and the contactor on the condnser.
Whenever the fuse blows,one of these components should be hot to the touch.
Check the wiring on all these parts and or replace the wires.
If the fuse consistently blows,a amp meter might help narrow down the over-amping part.
Take a Kid fishing.

Offline Repair-man

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Re: Ruud Furnace
« Reply #6 on: September 23, 2010, 06:46:03 AM »
I had one doing this  during the summer, and ultimately discovered the LV thermostat wire going to the condenser to be pinched where it comes out of the  brick wall. This particular house  had the LV wires run alongside the HV circuit in the same conduit to the unit, and both passed thru a shut-off box on the wall near the unit. I got lucky and found the pinch after replacing the fuse several times. The odd thing was, the unit had been installed for 7 years before this showed up...
Cut out the flattened section and it worked fine.
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Offline fullerdan27

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Re: Ruud Furnace
« Reply #7 on: September 23, 2010, 09:35:27 AM »
Thanks everyone for there replys. Found out it was a short in the 24 contactor over heating. Replace and issue resolved.

Offline JWWebster

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Re: Ruud Furnace
« Reply #8 on: September 23, 2010, 12:03:52 PM »
Wow that is unusual. Mostly the coil dies. A shorted coil is weird to say the least.
The coil was getting hot and going to ground. Wild. Glad you could get er goin.
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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