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airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8134
Experience:  Furnace, A/C and heat pump specialist.
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I live in Houston, tx and its hot¡ i have a trane xr12, the

Customer Question

I live in Houston, tx and its hot¡ i have a trane xr12, the compressor is not kicking in but the fan comes on on the outside unit. Any solutions?
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Do you have a meter for checking voltage and capacitance? One possible cause is a bad capacitor for compressor. If it is swollen it is bad, if not we would need a capacitance meter to check it.

Customer: replied 1 year ago.
Dont have a volt meter
Expert:  airheatman replied 1 year ago.

Can do check capacitor to see if it is swollen as shown in pic I sent?

Customer: replied 1 year ago.
Where can i find the capacitor
Expert:  airheatman replied 1 year ago.

It will be in the service compartment of the outdoor unit near the contactors.

Customer: replied 1 year ago.
Let me check
Expert:  airheatman replied 1 year ago.

Standing by

Customer: replied 1 year ago.
Capacitor not swollen
Customer: replied 1 year ago.
Is it posible that it can still be bad¿
Expert:  airheatman replied 1 year ago.

Ok from here will we need a meter since we can not see power.If you want to get an inexpensive one at Lowes or Walmart I can guide you. Yes it can be bad although not swollen. THat would require a meter that reads microfarads (uF)

Customer: replied 1 year ago.
If you can please tell what i need to do after i get volt meter.
Customer: replied 1 year ago.
Where can i buy a capacitor¿
Expert:  airheatman replied 1 year ago.

Best thing to do is leave question open ,obtain the meter and then we will go step by step.We can continue working here until we are done .

First step is to set meter to uF setting and remove power,then wires from capacitor and verify it is within 3% of rating marked on side.

If capacitor is good we will start checking volatge at various places (Contactor,Compressor, etc.)Make sure to get a meter capable of reading both capacitance and voltage.

AS for cap if it is bad or weak, you can get at any appliance parts or hvac supplier.

Customer: replied 1 year ago.
Would home depot or lowes carry cap
Customer: replied 1 year ago.
How likely is it that the compressor is bad¿
Expert:  airheatman replied 1 year ago.

It is pretty common for the cap to go bad, but I hae condemning parts without troubleshooting to verify. Home Depot or Lowes will not have but a local applaince parts store wherethey sell ac, washer dryer and stove parts will ahve

Customer: replied 1 year ago.
Ok, let me go get meter. How do i get back to you.
Expert:  airheatman replied 1 year ago.

Sounds good, WE will go from here.

Expert:  airheatman replied 1 year ago.

Remember we want to read both capacitance and voltage AC

Customer: replied 1 year ago.
What do capacitors cost rougly¿
Expert:  airheatman replied 1 year ago.

Capacitor will probably run about 30 bucks

Customer: replied 1 year ago.
Ok, i have volt meter
Expert:  airheatman replied 1 year ago.

Ok what is model on meter? Do you know how to check capaciotr?

Customer: replied 1 year ago.
DM-350A its a digital multimeter SPERRY brand
Expert:  airheatman replied 1 year ago.

I don't see a uF (Capacitance ) setting on the DM-350A.