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Gaztech
Gaztech, HVAC Technician
Category: HVAC
Satisfied Customers: 437
Experience:  Owner at Gaztech
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Our A/C came on when the wife switched Heat to Cool on Auto.It

Customer Question

Our A/C came on when the wife switched Heat to Cool on Auto.
It worked for 20 mins and shut off. She assumed it hit the temperature.
But since then (yesterday) the A/C wont kick on with On or Auto. I cant make it come on no matter how low the setting.
It blinks "Cool On" for a minute and does nothing. I have kicked the breakers on and off.
Changed the batteries on the thermostat. Need help...Thanks
Submitted: 12 months ago.
Category: HVAC
Expert:  airheatman replied 12 months ago.
1.Do you have a volt meter for troubleshooting?2.If you lower temp down to say 50 will outdoor come on?3.Is indoor coming on?
Customer: replied 12 months ago.
No Volt meter
lowering to 50.....neither outside or in comes onThermostat indicates it is on....but says TEMPORARY on thermostat
Customer: replied 12 months ago.
It is not kicking on!
Expert:  airheatman replied 12 months ago.
OK if fan ON will not make fan come on, lets try a couple of things.Can you do some hands on? If so give me model on indoor unit
Customer: replied 12 months ago.
It is a Trane XB (5 yr old unit)
Expert:  airheatman replied 12 months ago.
Look on label for an actual model number so I know what we are working with,will probably start with letter t
Customer: replied 12 months ago.
We have to 2 units
Expert:  airheatman replied 12 months ago.
Lets do this. Go to air handler and open it up. Locate the R and G wires from thermostat and touch them together and see if fan comes on.If not, look for a small 3 or 5 amp auto type fuse in air handler(Maybe on control board) and see if it is blown.
Customer: replied 12 months ago.
the number is *****
Expert:  airheatman replied 12 months ago.
Lets do this. Go to air handler and open it up. Locate the R and G wires from thermostat and touch them together and see if fan comes on.If not, look for a small 3 or 5 amp auto type fuse in air handler(Maybe on control board) and see if it is blown.
Expert:  airheatman replied 12 months ago.
Since this is a gas furnace, there will be a door switch.That switch will have to be held down to try the above jumping R and G terminals on board.Go ahead and see if that fuse on board is blown
Customer: replied 12 months ago.
Is the board behind the small meta door with 1 screw inside? Is that where the red and Gr wires are?
Expert:  airheatman replied 12 months ago.
Board will be in blower compartment.May or may not have fuse.Jumper R and G terminals on board with door switch held in
Customer: replied 12 months ago.
ok...no fuseI have 4 large fat wires going to the bottom of the board B, Y, R , BL
The only green wire goes into a coupler with OR, 2 reds , yeellow, green white blue ....No way to touch those together
Expert:  airheatman replied 12 months ago.
Do you see the terminals on bottom of board labeled Y W R G and C? Can you upload a pic of what you have?
Customer: replied 12 months ago.
I can ....send it to your email?
Expert:  airheatman replied 12 months ago.
If you have a paper clip icon on your page you can attach using that link.OrYou can upload the pictures using the tiny pic site .Here is a link to the site.http://tinypic.com/Click on Browse , select the file from your folder.then click UPLOAD NOW.They will give you a quote to enter in the box to verify you are a human.Enter the quote and click UPLOAD NOWYou will see your picture on right side of screen.Then copy the link URL for email & IMPaste that link here on the site.
Customer: replied 12 months ago.
http://tinypic.com/r/2hmppx5/9
Customer: replied 12 months ago.
have you received? Still there?
Expert:  airheatman replied 12 months ago.
I am here trying to open pic
Expert:  airheatman replied 12 months ago.
This is the R and G I am saying jump to see if blower will come on
Customer: replied 12 months ago.
ok...let me go try that
Expert:  airheatman replied 12 months ago.
Standing by.Remember door switch will have to be held in. Also tell me if this red light comes on when door button is pushed in.
Customer: replied 12 months ago.
touched that r and G together while holding switch in....Nothing!
Customer: replied 12 months ago.
red light does come on when switch is pushed in
Expert:  airheatman replied 12 months ago.
.Did you touch the terminals on board? (Not just wire to wire?
Customer: replied 12 months ago.
But it blinks...not solid on
Customer: replied 12 months ago.
red to green and green to red????
Expert:  airheatman replied 12 months ago.
How many blinks between pausing or is it just a steady blink.I am talking about jumping like this pic, except R and G instead of R and Was shown.http://i.imgur.com/JprQdYv.png
Customer: replied 12 months ago.
the blinks are consistent....
I will have to get some wire to jump from R to G...hang on
Expert:  airheatman replied 12 months ago.
Standing by
Expert:  airheatman replied 12 months ago.
The slow flash is normal
Customer: replied 12 months ago.
okay....blower came on!
Expert:  airheatman replied 12 months ago.
OK that is good. Now lets put panel back on and go to thermostat.Do same at thermostat terminals.Then do R and Y and see if outdoor unit comes on
Customer: replied 12 months ago.
take jumper off and put back wires andgo thermostat?
Expert:  airheatman replied 12 months ago.
Yes
Customer: replied 12 months ago.
Jumped red and yellow on thermostat and nothing happened on outside unit
Expert:  airheatman replied 12 months ago.
How about R and G at thermostat?
Customer: replied 12 months ago.
Do I need to put thermostat cover on to work
Expert:  airheatman replied 12 months ago.
No we are bypassing it
Customer: replied 12 months ago.
Nothing with Rand G
Expert:  airheatman replied 12 months ago.
Ok now, to make sure, at thermostat we are touching the wires correct?
Customer: replied 12 months ago.
No....jumped as we did on handler
Expert:  airheatman replied 12 months ago.
Sorry at thermostat we need to touch wires as we are bypassing thrmostat
Expert:  airheatman replied 12 months ago.
Wires that goes to R and wire that goes to G and Y
Customer: replied 12 months ago.
k.....going back and starting over. Red and yellow wires touch, right.? Then try RandG?
Expert:  airheatman replied 12 months ago.
Correct
Customer: replied 12 months ago.
Nothing for either combo
Expert:  airheatman replied 12 months ago.
1.Do you have a meter to check voltage?2.R and G made fan come on at board, but R and G does not with thermostat wires?3.All wires still connected at furnace board and door panel in place?
Customer: replied 12 months ago.
No to question 1
Yes to 2 and 3
Expert:  airheatman replied 12 months ago.
OK if jumping R and G at board made fan come on, but did not when jumping wires at thermostat we have to have a break in thermostat wire somewhere between furnace and thermostat as that is technically doing same thing. Look and see if maybe there is a float switch in drain that breaks the red wire between furnace and thermostat.
Customer: replied 12 months ago.
There is a float switch attached to the drain pan. all wires seem to be secure
Expert:  airheatman replied 12 months ago.
Try bypassing it by disconnecting float switch and connecting thermostat wires without float switch in circuit
Customer: replied 12 months ago.
unplugging the unit should do that right
Expert:  airheatman replied 12 months ago.
No you will need to disconnect the wire nuts on the wires to float switch and take it out of circuit.Then connect the two wires straight to each other leaving float switch out of the circuit
Customer: replied 12 months ago.
okay.....by passed float switch and crossed r and y....then r and G.....still nothing
Expert:  airheatman replied 12 months ago.
OK we have to have a break in circuit somewhere.I am about to leave for the night.Would you like me to open to other experts to see if anyone has ideas?
Customer: replied 12 months ago.
sure....thanks for your help
Customer: replied 12 months ago.
when will i knoiw they are on?
Expert:  airheatman replied 12 months ago.
No problem and wish you the best with this.All experts available will see question immediately.If any have other ideas we have not covered, they should reply soon.Thanks again for letting me work with you.
Customer: replied 12 months ago.
anyone there to help me thrun this?
Customer: replied 12 months ago.
Expert:  Gaztech replied 12 months ago.
Hi my name is ***** ***** I will do my best to help you with your issue.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 12 months ago.
2 minutes
Customer: replied 12 months ago.
Ok Luke.....Are you caught up with all that Airheatman and I accomplished?
Customer: replied 12 months ago.
Ready Luke?
Expert:  Gaztech replied 12 months ago.
After reading the conversation it looks like you are very close to solving the issue.Details are very important at this stage,You said "okay.....by passed float switch and crossed r and y....then r and G.....still nothing"NOW.. the 2 wires going to the float switch should be joined together, not the 2 wires on the float switch.Then instal door panel on furnace and try starting system from t-stat calling for cooling without any other wires bypassed.
Customer: replied 12 months ago.
I attached the 2 wires that each float wire was attache to.. Is that correct?
Expert:  Gaztech replied 12 months ago.
Thats right, is that what you did last night?
Customer: replied 12 months ago.
yes and then I went back and touched the Gr and Red on the thermostat and nothing happened
Customer: replied 12 months ago.
Thats where we left off
Expert:  Gaztech replied 12 months ago.
OK so now what do you get?
Customer: replied 12 months ago.
??????
Expert:  Gaztech replied 12 months ago.
You know we could be very effective if continue by phone, what do you say?
Customer: replied 12 months ago.
Cant afford......if we are that close...lets go!
Expert:  Gaztech replied 12 months ago.
OK, Fallow wire from float switch to furnace control board, and take clear picture of bottom compartment of furnace. attatch picture using the paper clip logo above conversation box
Expert:  Gaztech replied 12 months ago.
Also a picture of the float switch area also
Customer: replied 12 months ago.
no paper clip ...need to upload at tinypic.com
Expert:  Gaztech replied 12 months ago.
It might say attach file
Customer: replied 12 months ago.
No...went thru this last night. Do you know the tinypic.com that thetechnician sent me last night?
Expert:  Gaztech replied 12 months ago.
No, but cant understand why you cant find the attach files on the page when everyone else get's it??
Expert:  Gaztech replied 12 months ago.
Are you using PC or phone?
Customer: replied 12 months ago.
ipad
Expert:  Gaztech replied 12 months ago.
Ok, well the only other option I can offer you is PHONE, if you consider how much a service call is going to cost you, it might be the best choice
Customer: replied 12 months ago.
You arent offering the option the other technician did? I am sure you have an email I could send the pics to
Customer: replied 12 months ago.
How about that option?
Expert:  Gaztech replied 12 months ago.
***@******.***
Customer: replied 12 months ago.
okay...sent
Expert:  Gaztech replied 12 months ago.
checking
Customer: replied 12 months ago.
Pilot light is not necessary for A/C....correct. Because, It is not lit
Expert:  Gaztech replied 12 months ago.
Thats fineOk look at board, the t-stat wire red that is maretted to the white, take that red and connect it to the R terminal on board
Customer: replied 12 months ago.
done....what about the white that is loose?
Expert:  Gaztech replied 12 months ago.
Leave it for now, it's for the float switch that we unpluged for now,OK now try system
Customer: replied 12 months ago.
Cool On is blinking on thermostat and NO units are running outside or at the Handler
Expert:  Gaztech replied 12 months ago.
Blinking mean 5 min delay before it starts system because power was interrupted, just wait for it
Expert:  Gaztech replied 12 months ago.
hey meanwhile try fan on at t-stat and did you put bottom panel on furnace
Customer: replied 12 months ago.
No longer blinking...solid cool on.Nothing running!
Yes I have the bootom cover on for activation switch.
What do you mean try fanon with T stat?
Expert:  Gaztech replied 12 months ago.
There is fan mode on your t-stat, put it to on, I have to leave soon
Customer: replied 12 months ago.
put itto fan and turned system off
Customer: replied 12 months ago.
nothing
Expert:  Gaztech replied 12 months ago.
At t-stat do you have a jumper between RC and R?And all wires properly connectedRed-R with jumper to RC
Customer: replied 12 months ago.
jumper in and nothing
Expert:  Gaztech replied 12 months ago.
You handicap with this whole issue is you don't have a volt meter to do a proper test of your system wont accept Phone option, and ,unfortunately I am also opting out...
Expert:  Gaztech replied 12 months ago.
Going back to what was said before, there is a break in the wires between t-stat and furnace
Customer: replied 12 months ago.
We spoke last night until 2AM and you had to leave. I am very frustrated at this point. Where do we go from here?
Expert:  Gaztech replied 12 months ago.
Last night discussion was with a different tech. I am not supposed to opt back in after I opt out but here is one more suggestion cause I notice no other tech has taken your question.I see in the picture you sent me that you have unused wires from the t-stat to the furnace that are unused, swap the red and green and yellow with another unused wire from t-stat to furnace.Try that, I will be back later..
Expert:  Gaztech replied 12 months ago.
OK
Customer: replied 12 months ago.
I think the work you did was very good. Take no offense. I appreciate your support
Consider me satisfied, and close us out
Expert:  Gaztech replied 12 months ago.
Cheers!!