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I have a 2003 cts and the heat and a/c are not working what should I do?

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  • Cee Car Apr 26, 2017

    Also the buttons to turn the heat or ac on and off seem to be working



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Have the dealer scan the system for faults.

Posted on Apr 26, 2017


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2 Answers

Why wont my heat work in my 03 cts

also check the heater valve is working
for coolant to flow to the internal heating radiator



Oct 15, 2016 | 2003 Cadillac CTS

1 Answer

I have an 03 cts radio comes on but no sound,gas gauge don,t work,want release key, want come out of park ,service alarm system light flashing but it run's, what could be the problem?

Not familiar with this vehicle but exactly the same fault happens with the Vovo S80 if the steering column Control module loses power , then it's just a simple case of checking fuses or the heat sink to the dash display IC sometimes overheats . All you have to do there is replace heat paste and clean display plugs to fix , as I say not sure if this car has same or similar system .

Jun 18, 2015 | 2003 Cadillac CTS

1 Answer

2003 Cadillac Cts No Heat On Driver Side. Passenger Side Works Fine

you have a bad stepper motor or bad control unit

Jan 27, 2013 | 2003 Cadillac CTS

2 Answers

I have a cadillac 2003 cts car and come out theft system how can desactivated can you help me please

If your portable remote is not work , you may need to replace the battery with new one. If it not work , you need to disconnect power supply into your security system / immobilizer / anti theft.
Regards, Jay

Feb 19, 2011 | 2003 Cadillac CTS

2 Answers

I recently got an oil change. Now when I'm driving it's smocking under the hood. I trun the heat on in the smock is coming into the car. Do anybody no what my problem is? 2003 cadillac cts

most likely the mechanic spilled oil when filling, check to make sure the oil filler cap is still on. if it is just spilled oil it should burn off and be ok.

Dec 18, 2010 | 2003 Cadillac CTS

1 Answer

2003 cadi cts - heat only works on drivers side and cold air on passenger side - blower works fine - what might be the problem?

Check operation of passenger side air direction deflector vane in the heater ducting.
You may have a seized vane hinge or faulty actuating servo/control.

Oct 29, 2009 | 2003 Cadillac CTS

2 Answers

The AM/FM radio in my 2003 cadillac CTS faded to only static

check antenna cable connections at radio & antenna.suspect power antenna if equipped.

Sep 30, 2009 | 2003 Cadillac CTS

2 Answers

2003 Cadillac CTS

If the AC compressor was working full time including when the heat was on in the winter, this would certainly cut short the life span of the compressor. Usually, the compressor won't come on unless climate control is calling for AC. If this was the case, the issue is more likely the climate control itself, either a sensor or the whole unit. Should have been caught when you had it diagnosed in the winter if this was when you had it in the shop. Hope this answers your question. Best of luck.

May 26, 2009 | 2003 Cadillac CTS

4 Answers

2003 cadillac cts drive shaft is making knocking noise

My 2003 CTS had the same noise problem while on vacation one day. When I returned from the vacation and dropped it off at the Caddy dealership it was revealed that several of the "U" joint nuts had worked themselves loose. A quick fix was to tighten up the "U" Joint bolts and the problem was solved!

Jan 04, 2009 | 2003 Cadillac CTS

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