Left turn signal start normal then gets faster.

Doesn't have a turn signal flasher , use's lighting control module .
Turn Signal and Hazard Lamps The turn signal system consists of:

• turn signal miniature bulbs (13465).
• turn signal indicators in the instrument cluster (10849).
• lighting control module.
• multi-function switch (13K359).
• circuit wiring and circuit protection.

Power is supplied to the lighting control module through instrument panel Fuse 6 (10A). This fuse is hot in START or RUN. The lighting control module is connected to the turn signal switch portion of the multi-function switch. Ground is provided to the lighting control module and the turn signal miniature bulbs through Circuit 57 (BK).
Turn signal functions are performed by double filament bulbs in lamp assemblies located next to the headlamps. The turn/hazard function uses the second filament of the appropriate bulb(s).

• With the multi-function switch in the right turn position, power is supplied to the RH front and rear turn signal miniature bulbs and the right turn indicator in the instrument cluster.
• With the multi-function switch in the left turn position, power is supplied to the LH front and rear turn signal miniature bulbs and the left turn indicator in the instrument cluster.

Run a diagnostic check on the car. If these codes come up this is what they mean. C1233 No left wheel speed signal
C1234 No right front wheel speed signal

C1236 No LR wheel speed signal
check wiring and sensors

one of the three of them is blown,turn it on with car parked and see which light is out

It's possible that there is a leak somewhere in the AC system and when you turn the car on the high pressure in the lines pushes some of the freon out. Normally you don't need to add freon so my guess is you have a small leak somewhere.

Sounds like you checked this...but when one side flashes faster than the other...usually the fast side has a burned out bulb in front or rear...Be sure to check all blinking lights...including the side marker lights on your Lincoln...stays on when turn signal is engaged on same side front...:)

if i understand you the left turn signal blinks faster than the right one.
if that is it it means one of the turn signal bulbs is bad , going bad or is loose. check all bulbs for good connection replace if one is dim or out completely. good luck

Ok. First of all, chk all the bulbs. Well at least the four parking lamps. The ones that are supposed to flash. One or two are burnd out. It happens. The flasher(s) work on resistance and that is provided by the bulbs.Brake likes and the turn signals are electrically associated.and you already said one side does not work, so let's start with bulb inspection Let me know

Turn on the Cruise control ON on left side of steering wheel accelerate to desired speed push set button on right side of steering wheel to turn cruise OFF press off or tap brake pedal

when a turn signal indicator flashes faster than is normal it is your vehicles way of telling you there is a problem with the lighting system, do a visual check of your turn signals and you will find a burned out bulb. just replace the bad one and it will return to normal

sounds like the bulb you have is the wrong resistance the new noen bulbs will do this