I have a 10 year old RHEEM electric heat pump. I recently noticed black spots on the inside of my A-coil, looks like it is growing too!! balls of black chalk. Am I DONE FOR ? It also jambs up my condensate pump from the coil with rust and gunk. Has my heat pump had it, or should I call a service guy to clean it out? Also is that black stuff toxic or just plain mold?? Please help Wife worried kids will get sick with HVAC on !
Thanks for anybodys advice!! Ed R.
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