Mini-Split not blowing heat after a power outage.

[Steve23]

Hi,

We had a power outage a couple of nights ago. Not long after power returned, we powered on our mini-split.
Both the indoor and outdoor units appear to be running, but there is no blower or obvious heat coming from the indoor unit when in heating mode.
The mini-split is running almost all of the time, so it was likely running when we lost power.

No codes (flashing lights) can be found on the indoor unit. Everything looks the same.
It shows the power on, temperature and outdoor compressor light. And after a while, the compressor light turns off as it normally would. Nothing out of the ordinary.

I opened the outdoor unit and it showed three green LED lights flashing in unison. When I looked that code up, it stated "Normal frequency rising and decreasing, no limitation". So as far as I'm concerned, it's running normally as well.

If I'm not mistaken, I swear I feel the indoor unit radiating some heat, but without the blower, I don't know for sure. Also, I can rule out the indoor unit's blower as in other modes, the blower is working. So this issue seems specific to the Heating mode.

So what component in the indoor and outdoor units could prevent heat from being transferred, or prevent heat from being blown out of the indoor unit? Are there typically fuses inside the units that can be inspected and replaced?

Of course I'd like to eliminate to cheaper possible causes before jumping into the more expensive replacements.

Thanks, Steve.

[Admin]

Does the indoor fan run in cooling mode or if you switch it to continuous mode?

My guess is the control board that powers the indoor fan got fried.  You would need a multimeter to see if it's the board or fan motor itself. 

[Steve23]

Thank you for the reply, fellow Ottawan!

The fan on the indoor unit does run in all other modes, just not in heating mode.

So it appears the issue is related to just heating, although I can't be sure because I can't cool as the the indoor unit's thermostat doesn't go low enough for me to properly test cooling. The room is too cool. :-)

If I can carefully remove the cover, I'm going to take a look at the indoor units circuit board, looking for easy to replace components like fuses.

But I'm open to more ideas!

Thanks, Steve.