you need to look close and see if that leak is AT that point or the hose
simply carrying the leak outside the heater.
sorry but it MAY be your core is busted and it PROBABLY is due to being
jostled when the A/C is worked on.
And -if so- it's a separate, incidental problem that COULD have occurred no
matter how careful the guy was.
Maybe the shop will take pity on you and give you a discount.
OOOPS ! On reading it again - That is your a/c condensate drain.Definitely
need heater core replaced.
If they disconnected the heater hoses during the previous service, make sure
there's still a restrictor in the hose that connects to the intake manifold.
Heater core is leaking and needs to be replaced. Ten years is about the
normal lifespan of a heater core. Breathing those fumes isn't good,
since they are noxious and bad for the lungs. Replacing the core isn't
a difficult job and the replacement cores aren't expensive.
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