Ac stuck on 66 degrees

Does it look like this ?
97 03 Pontiac Grand Prix Dual Zone Heat AC HVAC Control Unit 09351482 66...
If so it is automatic

Service Manual - Grunaire - LoPDF

www.lopdf.net/...,/Service-Manual-Grunaire.html?...Grunaire-Remote-C...

• Cached

1 Summary and features Indoor Unit GSI091HXD GSI121HXD Outdoor Unit GSU091HXD GSU121HXD Remote control window YT1FF Summary and features.

hope this is your unit, on page 11 it tells you what the buttons on remote do

What type of unit? Most units can be hard wired to a regular thermostat but you will need the owners manual to reset the program in the circuit board. The manual can be downloaded from the internet.

You have to call ac technician to check gas pressure, indoor to out door connections and then only we could solve.

Taking apart the hand held remote won't serve any real purpose as none of the parts inside are replaceable. Since you have 3 different units, with 3 different hand held remote. I'm wondering, if perhaps, you're using the wrong remote on that one unit. As each one has a different remote code.
In addition, I have learned from experience, that if the display screen on the hand held works, the problem is not in the hand held. Now, that's not to say, Operator Error can't play a role in it. But, most times, it's the receiver in the unit,that may be causing the problem. Or the hand held is to far away or something is blocking the signal in between.

Almost every appliance we sell, has a radio frequency remote control. The most problems we incur is with weak or dead batteries or operator error. The problem with batteries is that you don't now how long they sat in a warehouse, before making to a retail outlet and then how long they sat on the shelves there, before they were sold. They may have enough power to activate the handheld remote, but not enough to transmit a strong signal. So, check the strength of the new batteries you installed.

Hope this helps and thanks for choosing FixYa.

Well the fuse is ok if it lights up. Could be a stuck button. The ac does not need the remote to make it go. press the mode button and move the lights to the cool selection and set the temp below 70. It should kick on. You might have to go a bit deeper. The next thing I would check is for a leaking capacitor. If it leaks then nothing will happen.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

yeah you have to be carfull the only thing that does is shut the inside fan off it does not mean anything. it is a selling thing

If the house is actually cooling, but the thermostat thinks in 90 degrees in there, you definitely need a new thermostat. If the house is actually 90 degrees, the AC SHOULD cycle on and stay on till it reaches the preset temperature. Since it doesn't make sense that you would complain about the AC cycling on at 90 degrees, I can only conclude that you have a faulty thermostat.

well ? Does It get cold @ 66 Degrees? And If so.. Aint 66 degrees cold?