20 Most Recent Goodman GMS80903BNA Heater - Page 8 Questions & Answers

It is meant to shut off when it gets so cold that the unit cannot make warm air from outside air that is too cold. When it reaches that situation, it should be switching the heating effort to the built in resistance heating. In other words, it gives up and directs that many KW of electricity go straight into heater coils, like and electrical dryer has. It is very expensive to heat this way. Most whole house heat pumps can't handle cold air. The newer mini split ductless heat pumps lower can work with outside air temperature below freezing depending on the manufacturer.

very vague on information and question --check and test thermostat for correct operation and operating ---check gas is on --- check and test thermocouple --and other sensors [ clean or replace if failed ] check and test fan and relays

check flame sensor connections and that it is clean check air filter is clean . and the pressure switch

Check auto settings some thing is holding it off .

I am not familiar with the appliance but a transformer is likely to fail if it is the wrong rating for the application, if there is a fault in a component or circuitry causing an overload condition, there is insufficient cooling or ventilation or the transformer is of an inferior quality.

Have you checked the codes to see what one blink is, look on the door panel

With a heat pump the indoor fan coil does not have a yellow wire that is true your yellow wiring comes from the thermostat which is a 6 wire or 8 which is also true coming from the outdoor condenser you must connect the yellow coming from the condenser and the yellow coming from the thermostat inside the fan coil cabinet the purple is for heating

Typically the filter is located externally of the furnace. If not the lower door near the blower housing. Turn off the power to the furnace 1st. and open that door to look for the filter

Look at page 20 on the manual. https://www.manualslib.com/manual/695287/Goodman-Msg-12crn1n.html?page=20#manual

compressors dont go weak either valves are failing -or unit motor failing --and if have leak will need fixing and depending on where and why leaking not cheap --get 2nd opinion

You have to take the side panels off first on some units. Typically there are 5/16" screws along the top of the unit. Make sure you have the power off to the unit before working on it.

You need to locate your unit drain line and clean it out

Start by washing the condensing coil.

repair with a waterproof sealant tape or epoxy until find a replacement

The black and white wires get 220 from the contactor. The brown and brown/white go to the capacitor. I do hope you bought a matching capacitor to go with the new motor. They don't cost much and make the hook-up way easier.

Just buy a term loc kit, you dont necessarily need the O.E.M. plug!

The capacity is not important unless it is empty. If it was empty it wouldn't be freezing. You should be charging with subcooling and superheat.