Smells like fish inside the cruiser when I turn on the Heat

[Atx Cruiser]

In the last couple weeks the air coming out of my vents smells like fish when I turn the heat on. If I turn the HVAC off the smell goes away. I changed the cabin air filter thinking that would be the culprit, but no go. I did make sure there was nothing funky blocking the intake vents on the outside near the passenger side windshield wiper. My first few searches on Mud suggested either the heater core has gone bad or the evaporator coil needs to be cleaned. Any other suggestions before I take it to my local shop? I don't even bother with the dealerships unless it's a warranty thing.

2013 MY
89000 miles
Usual maintenance performed.

 

[apachechef]

Smell your coolant, does it smell like fish?

 

[Sandroad]

Well, first get rid of the fish with a setup like this:

All Around Affordable Fly Rod / Encounter 5-weight 8'6" Fly Rod Outfit -- Orvis

Anyway, if you're not getting the ideas you need from a search on the 200 section, hop over to the 100 section and run some searches there on cabin filter smell, AC smell, etc. There are a lot of threads/posts there on that issue (as I know from my 100 experiences). You shouldn't have any equipment failure problems with an LC as young as yours. It's likely a matter of cleaning.

 

[Island1064]

So basically you need kelp,
Sorry I shouldn't but this Kraken me up
Are you shore it's fish?
Careful when going under the hood you might pull a mussel.
Maybe you should check the other tide of the filter
Have you asked Cod ?
Did you ask Santa Claws for a new filter ?
You might need a license to Krill

Sorry but 7 days without a pun makes one weak.

 

[gaijin]

Sorry but 7 days without a pun makes one weak week.

There, I fixed it for you

 

[Yeti White]

So basically you need kelp,
Sorry I shouldn't but this Kraken me up
Are you shore it's fish?
Careful when going under the hood you might pull a mussel.
Maybe you should check the other tide of the filter
Have you asked Cod ?
Did you ask Santa Claws for a new filter ?
You might need a license to Krill

Sorry but 7 days without a pun makes one weak.

you're punny

 

[40Man]

So basically you need kelp,
Sorry I shouldn't but this Kraken me up
Are you shore it's fish?
Careful when going under the hood you might pull a mussel.
Maybe you should check the other tide of the filter
Have you asked Cod ?
Did you ask Santa Claws for a new filter ?
You might need a license to Krill

Sorry but 7 days without a pun makes one weak.

Just stay away from trans fluid. Just sayin'. :/

 

[TonyP]

My guess is coolant.