Air is moving through the system however the system will not heat. Just changed the thermostat from the I believe 160 degree to the standard 185 degree. Those might not be the exact numbers but that is the concept. Then the thermostat was changed to the 160 the heating ability declined as expected. It has not come back though after changing back to the 185 degree thermostat.

when I saw this question last night, I thought to myself 130' seems awfully low!

Correct Operating Coolant Temp

Toyota Nation Forum https://www.toyotanation.com > threads > correct-oper...
Jan 26, 2021 - It should be around 185-190F. Buying OEM, it usually comes with a gasket. You'll need to drain the coolant, so it's a good time for a flush.

I think you have air in the cooling system, perhaps even a stuck thermostat, or a heater valve that isn't opening. Start with burping all the air out.

https://www.fixya.com/cars/r29872074-vehicle_cooling_system_no_heat

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1) The "heat" cycle on a vehicle depends on the engine's operating temperature when "heat'' desired," as well as the "external temperature of the atmosphere; colder days will create "lower" internal temperatures for the vehicle's passenger compartment as related to the amount of cooling of the radiator fluid through the radiator.
2) One option exists as to place "a 'piece of cardboard' in front of the radiator itself," especially in very cold areas of the country.
3) The other problem may involve your "thermostat" of the vehicle being "bad" (they fall apart sometimes), versus being of the wrong temperature variety; In this case your "automotive technician" should be consulted so as to replace your vehicle's thermostat with a different thermostat.
4) Lower temperature thermostats (185 F) open the system to the engine at 185 degrees; with 195 F opening the system at 195 degrees.
5) One of these solutions (the cheapest being the cardboard) may be of assistance (just remember to remove the cardboard in the summer/spring).
6) As of 03-09, 2019 @ 1448 CST; I'd like to add this comment to my above earlier data: It's "best" to never "change" the thermostat rating (exampled from a 185 to a 195; even vice versa) on your vehicle. Simply use the cardboard, removing it with warmer weather.

Unless you are in the Artic, there is little need to change thermostats. Once Pollution controls were invented the operating temperature of engines were raised to about 195 degrees on average.

In the old days, thermostats were as low as 165 degrees and I believe as high as 210 degrees.

In the old days, you did not have Automatic Electric radiator cooling fans to supplement the water system. If you were to increase todays thermostats by too high of a margin, the Electric cooling fans would run almostt constantly.

Please rate my info.

What ever is the factory installed thermostat is all you
should ever have in there.

Todays car only run with the correct thermostat
Any dealer or parts store can look that up

Normal when?
On a 95 degree day with the air on?

Any vehicle will run 200 to 205

If your over 220 any time of the year you should
find out why

You can not have engine cylinder misfires,old O2 sensors
that result in wrong fuel mix,failed egr valve,timing belt jumped
a couple teeth,your problem most likely, if not a head gasket

Heater core won't be any way related to engine issues

The thermostat is a critical part of your coolant system, the system that circulates water and antifreeze (coolant) through the engine to keep it from over-heating. It is called a valve because it can open and close, depending on how hot the coolant is acting upon it.
The reason to put a thermostat in the coolant system is to allow the engine to reach normal operating temperature quicker (and therefore operate at peak efficiency) than without a thermostat.
When the engine is cold, the coolant is at normal outside temperature, so the thermostat is closed. This means when you start the car, the coolant starts circulating through the engine, but can't flow into the radiator. With a closed thermostat, the coolant just keeps circulating around in the engine until the car warms up, the coolant gets hot, and the heat acts upon the thermostat, causing it to open at a certain temperature (about 185-195 degrees F.), With the thermostat now open, the coolant can now enter the upper radiatior hose and flow down the radiator to cool itself down, before going back into the engine through the lower radiator hose.
So the thermostat is always found on a car in the area where the upper radiator hose connects to the engine. Thermostat closed-water can't circulate through the radiator. Thermostat open- coolant is forced through the hose into the radiator.
I hope this helps you understand the thermostat valve and why all manufacturers include them.

Replace the thermostat. the temperture should be at the 190 to 200 mark

have your heater core pressure checked. it maybe clooged even though you had system flushed. additionally did you buy the correct thermostat? the computer is a sensitive thing and alot of other components are activated because of the temperature. the opening temp is 188-195 degrees. so you should have bought the 185 degree thermostat. i had same problem and bought the higher temp thermostat. i couldn't believe that such a small change would make a big difference. good luck.

okay temp is not hot enough check thermostat temp rating is it 195 degree etc. are you in a cold climate state? Maybe you need to get a thermostat of a hotter degree[four seasons 195 degree should do it]. If this is what you have (195 deg. thermo) then it might be stuck open not allowing the heat to build up. Another possibility is air in the radiator system, bleed system. This too might be of help the blend door, which is operated by the HOT to COLD lever on your climate control panel, might not be moving all the way closed to stop the cold air from coming in the mix area with the heat. Move the lever back and fourth to feel any change in heat with your hand. Put the defroster on fan on high and put one hand near the defroster vent thee other hand moving the temperature selector. Do you have some sort of heat and you can feel the difference from hot and cold, then my recommendation is to check thermo degree rating, if ok then try to flush radiator, and if that does not work --replace Heater Core. Thank you for allowing me to help you if you need me just write,Lee

This car requires to bleed the air from the sistem, look for a screw at the top of the outlet housing (the top radiator hose).

Also check if the radiator fan is turning on, it should be no later than past the center on the needle gauge .

a few things come to mind from reading your problem, first your right about the air, it could still have some in it, i know from experance they can be a bear to get all out. secound if your sure you got all air out, the only other thing it could be is a blowen head gasget. third if you suspect head gasget do a coolent system pressure test, and watch for leak down.