How do you get the clock out of a 2003 Hyundai Elantra? It doesn't work and I want to see if it can be fixed or replaced.

This is the most likely reason

https://www.fixya.com/cars/r29872074-vehicle_cooling_system_no_heat

It could also be seized blend door actuators not directing the hot air. Or the switch unit.

https://www.google.com/search?q=2003+Hyundai+Elantra+heater+does+not+work

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Mine does the same thing. I pulled it out and checked it. It's internal. A chip inside heats up and breaks contact. Wasn't worth fixing. $50 for it here.

Replace left front fender - Fixya

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Dec 29, 2015 - replace left front fender - Hyundai Motor 2003 Elantra question. ...Question about Hyundai Motor 2003 Elantra. Open Question ... How do i remove left front fender clip on a Lincoln ls 2002? Jan 04, 2015 ' 2002 Lincoln LS.

Replace 2003 hyundai elantra front passenger outside door ...

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Mar 26, 2013 - Question about Hyundai Motor 2003 Elantra. Open Question.Replace 2003 hyundai elantra front passenger outside door handle. Need to replacebroken exterior door handle on front passenger .... replace left front fender.

This is a common problem with these clocks where the set buttons stop responding. The only fix is to replace the clock unless you want to do some detailed soldering to replace the micro-switches.

it can if you have the proper tools and a little patience its not very hard at all it may be a little snug i cant remember off hand where the starter is located on that car but its relatively an easy fix.

you have to replace the whole clock pull it out unplug it and put a new one in you cant fix it

Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it.

did you check the fuses

Check all your fuse in dash & under hood for a blown one.