I have a RUUD Achiever heat pump. Where does the filter go? I don't see a slot for it. I can't even tell what size filter it takes, since there is no defined slot.

https://www.google.com/search?q=Ruud+achiever+90-plus&oq=Ruud+achiever+90-plus&aqs=chrome..69i57j0l5.1371j0j7&sourceid=chrome&ie=UTF-8


Might be the pressure switch on the illustration.

https://www.questargas.com/ForEmployees/qgcOperationsTraining/Furnaces/Ruud_UGTA%20Achiever%2090.pdf

www.ruud.com

Sounds like you want a service manual.

try changing contacter and capacitors. the c-083-s drier can be replaced if you pump system down. kind of expensive.

You should see no ice. Turn it off for a while like and hour or so.. Do you feel air coming out of the vents?

The duct work on the return air can be made to accommodate any size of filter and it may not be the size the furnace takes. Some installers can cut a slot in the outside of the duct and put the filter there, bypassing the manufacturers method of mounting. I would measure the slot or mounting and see what comes close.

Is this a heat pump? If it is the switch you thermostat to Aux. or emergency heatt.

You must first remove the blower compartment panel. The filter should be in there. However, since this unit is in a crawl space you may have a return air filter grill. Look at your return grill. Does it have a filter? If not does it have latches so that you can open it? If so measure the opening and install a new filter there. I hope this helps. Please don't forget to give me a Fixya rating.

I'd look in one of 2 areas.

1. often there is a central return in the house. This is the place where the air gets pulled back to the unit and is likely very close to your thermostat. Check for a filtered louvered grill there and see if your filter is located here. If so, you can access the filter by opening the filter frame with a screwdriver or even a coin.

2. Otherwise I would expect that your filter is on the return-air side of your air handler (where the blower is) Older models have the filter actually inside the air handler in the blower compartment. Newer models may have a small separate filter door. I'd look in these areas.

hope this helps
ghoff

does the furnace ignite?? your system may not have been lighting and has gone into ignition lockout count the codes of the led lights then remove panel led diagnostic codes are listed there.
if led codes indicate no problem verify capacitor is good and that mtr is getting 115 volts.

the reversing valve needs power to switch to heat. more then likly the o wire is connected when it shouldnt be