2010 honda accord
 

my 2010 has no heat on drivers side and lots on passenger side. plenty of air though

The heater core may be partially clogged. See this thread:
https://www.hondaaccordforum.com/for...rs-side-60908/

Got dual temperature control?
I don't know how the 2010 is setup, but I'm pretty sure there's only 1 heater core. What about the air-blend door not working for the driver's side?

will try a core flush... have examined the blending motor and replaced with a new one ...still the same. what product should i use to flush core. thank-you for your response

heater info
 

Is there any other device between the blending valve and the heater core which could effect the temperature supply on the drivers side

You would have to disconnect the heater hoses, then flush with water from a garden hose. There are some youtube videos on that. I think Ericthecarguy did one.

You never answered this question. Does your car have the option where you can set the driver's side and passenger's side to different temperatures?

yes there are duel temp. control

It is possible that the blend motor or blend door is not working on the driver's side of the vehicle.

Did a core flush and still the same. The motor controlled by the temperature controller for drivers side is new and working fine but after a closer look, less air flow is on the drivers side as well as no heating. The air flow is less on defrost, front and foot well. wondering if a operation and diagram of the heater is available. thank-you for your help, very much appreciated

Has the cabin air filter been changed recently? A clogged filter could restrict air flow through the heating system.