Usually when the seasons change our repair and maintenance calls go up from homeowners needing help with their ductless mini split systems. Sometimes when our expert service technicians get out to the call they find the solution was very simple, and could have been resolved by the homeowner. There are some basic diagnostic checks you can do at home before we come out for repair or maintenance service, it could save you time and money!

If you go through this checklist and you are still experiencing issues with your ductless mini split give us a call or schedule service right away. It’s likely you have need of a larger repair or maintenance service that the professionals should do. OTT Mechanical has the expert technicians and tools for any mini split repair job.

• • Power Supply:
    • First, check your circuit breaker for your outdoor unit to see that you have not had a power trip and your heat pump system does indeed have power.
    • Next, check the outdoor disconnect which is usually mounted next to your outdoor unit to ensure that it is on.
  • Efficient Air Moving: Old school air conditioning utilized inefficient single speed PSC motors for the indoor fan motor and the outdoor condenser fan motor. Armstrong offers two new more efficient motor systems:
    • ECM Variable Speed Motors can provide a broad range of airflows based on system requirements for better comfort and air quality while using less energy than other motor types.
    • Constant Torque Motors are higher efficiency, brushless DC motors that are designed to provide a given rate of airflow (CFM) even when operating conditions like static pressure change.
  • Check your zone controls:
    • Next, check that your devices remote has good and full batteries, if they are dead replace them.
    • Then, set one of your spaces zones to on, and if you’re trying to cool set the temperature well below the ambient temperature, or well above for heating.
    • If you are trying to heat, make sure that your system is not in “Defrost” mode. If it is wait a few minutes for your system to complete its defrost cycle.
    • If your circuit breaker was off, after turning the power on, give it a few minutes, because many systems have a built-in time delay which will affect operation.
    • If your system operating, but not performing properly:
      • This could be a filter problem, check your heat pump filters and clean them if they are dirty.
      • If it’s winter and you are heating, make sure the outdoor unit doesn’t have snow or ice on it.

Mitsubishi Mini Split Installation

Were proud to be certified as a Mitsubishi Diamond Contractor, one of a few here in the Montgomery County service area. That means we’re the best at what we do. If you’re looking to install or replace your businesses or home’s current mini split system we’re the pro’s for the job. We’ve got a full line of Mitsubishi ductless systems for your installation or replacement. If you don’t currently have a mini split system you will be amazed at how efficient, effective and quite these incredible units are. We can come to your home or business and give you a free quote for your new system. Schedule your service with us today!