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Gaztech
Gaztech, HVAC Technician
Category: HVAC
Satisfied Customers: 437
Experience:  Owner at Gaztech
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Replaced burned out contactor on XE1000. Engage power to see

Customer Question

Replaced burned out contactor on XE1000. Engage power to see fan start. for 2 seconds and shut down. Pull power the contactor clicks/disengages.
JA: I'll do all I can to help. Tell me a bit more about what's going on so we can help you best.
Customer: When I replaced the contactor I installed a new capacitor. Kinda expected problem solved. Since fan can start I am not suspicious of cap...
JA: Is there anything else the HVAC Technician should be aware of?
Customer: Nothing I am aware of
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the HVAC Technician about your situation and then connect you two.
Submitted: 1 year ago.
Category: HVAC
Expert:  Gaztech replied 1 year ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue.

If my initial response doesn’t answer your question then let me know and we can continue our conversation.

NOTE: I can only get paid for assisting you if you click FINISHED and RATE ANSWER after you are satisfied with answer.

Are you ready?

Customer: replied 1 year ago.
Ready
Expert:  Gaztech replied 1 year ago.

Sorry for delay, I am assisting 2 other cust. at same time.

Expert:  Gaztech replied 1 year ago.

So your saying that when you set t-stat on cooling the unit starts but shuts itself off in seconds?

Customer: replied 1 year ago.
New contactor burned out too what are most likely issues to cause new contactor to burn out?
Customer: replied 1 year ago.
After installing the new Cap & con yesterday the fan started for 2seconds and stopped Did that couple times as I checked power & fan spinning freely. After those checks tested the contactor again to see no volt downstream of the con. Cons are cheap but root issue of burn out needs to be identified yet.
Expert:  Gaztech replied 1 year ago.

Do you have a microfarad tester to prove new capacitor is burned out

Customer: replied 1 year ago.
No to microfarad Have not tested new CAP
Tested new contactor - There is no power after contactor
Expert:  Gaztech replied 1 year ago.

A capacitor can burn out for no reason like a light bulb, most time it will bulge out the top where the wires connect, or in a case where the compressor or fan motor are defective it can strain out the capacitor.

Do you have a volt meter?

Customer: replied 1 year ago.
I do
Customer: replied 1 year ago.
7 in 1 multimeter
Expert:  Gaztech replied 1 year ago.

good, Contactor has to be engaged with 24Vac coming from t-stat to give 240Vac to the compressor and fan

Here is a link to picture

Customer: replied 1 year ago.
Tested capacitor it is fine.
Contactor is fried. Unsure of root cause on old and new contactor burning out.
Uncertain contact points to test 24 from Thermostat
Customer: replied 1 year ago.
Checked tstat volts 1.2
Expert:  Gaztech replied 1 year ago.

Did you look at the link I sent you, it shows a picture of a contactor and contact points

Expert:  Gaztech replied 1 year ago.

T-stat 24v between R and C, or R and Y if system is off

Customer: replied 1 year ago.
1.2 best I get from tstat
Expert:  Gaztech replied 1 year ago.

is your tester on AC? NOT DC, if your not sure check it in a wall outlet for 120vac

Customer: replied 1 year ago.
ac
Expert:  Gaztech replied 1 year ago.

OK does t-stat have a terminal C and has a wire to it?

Customer: replied 1 year ago.
Getting zero reading on c & r
Customer: replied 1 year ago.
Zero on R & Y
Customer: replied 1 year ago.
Transformer?
Expert:  Gaztech replied 1 year ago.

I would check for a burned fuse in the indoor unit first, what model furnace is it?

Customer: replied 1 year ago.
Xe80
Customer: replied 1 year ago.
Do not see fuse on it
Expert:  Gaztech replied 1 year ago.

Open bottom compartment of furnace to access control board, notice the door switch, you need to tape that in to have power to unit, check fuse on board, if good then volt check 24v a terminal R and C

Customer: replied 1 year ago.
Normal flash. Appears correct / good
Expert:  Gaztech replied 1 year ago.

24v between R and C?

Expert:  Gaztech replied 1 year ago.

I have to leave soon, I was still waiting for you response.

Customer: replied 1 year ago.
No change here
Expert:  Gaztech replied 1 year ago.

24v between R and C?

Expert:  Gaztech replied 1 year ago.

Taking you to long to respond, communication and details are the key to resolving issue.

I will check with you later, here is next step to check is if you have a float switch in a pan under you furnace thats not making contact, or a condensate pump beside your furnace with a float safety switch with two wires, you can put the 2 wires together to see if that is the problem

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