I have a 2001 mirage 3600rl by Thor IND the dometic ac is low on coolant what kind of coolant does it take

Did you check voltage at battery while running? Or at alternator. Watch voltage at battery at idle, see if there is a drop over a period of time. Should be 13.5-14 volts. It may be as easy as replacing the battery, not just recharging it. Also check terminals to make sure voltage is making it back to the battery.

have some one remove cover on roof to track noise down.

The coolant type is not the issue but It seems there is a LOW LEVEL OF the COOLANT. Allow the engine to cool down and check the coolant level in the overflow/reservoir tank. If low you need to top up the coolant in the tank. Also check the pressure cap of the radiator, replace if there is low level of coolant in the radiator.
However if the coolant looks murky or rusty then it is best to flush out the coolant and refill with the specified type.

My Thor X 10 million candlepower spotlight takes a standard 12 volt, 1500 mA, center positive AC adaptor. You should be able to find one with an appropriate tip at any Radio Shack store, but you may find a cheaper universal adaptor at a Walmart or even at a "Dollar Plus" kind of store. An adaptor with a lower mA rating will take longer to charge your light, but it should still work (down to about 750-800 mA, I'm guessing).

Double-check the charging port of your Thor light to see whether there's any information about the input voltage requirements. On mine, the light itself has the charging port labeled for 12v, though I was reading the more detailed specifications off the adaptor itself. I can't recall whether the 2.5 million candlepower light also uses 12 volts of power (I think it does), or whether it takes 6 volts (a single battery vs. two batteries wired in series).

This is most likely low coolant level. Have you checked? When the level is too low, hot coolant doesn't circulate through the heater core. If you top it off, it should be throwing heat again. Keep an eye on the level, you may have a leak somewhere. If this isn't it, let me know so I can try to help further.

WELL WE TAKE HANGER TO DO IT OR SOME AIR THE TUB IS AT PASSENGER SIDE MOST OF THE TIME SOMTIME EASER TO SEE FROM UNDER CAR HOPE THIS HELPS

the air conditioning system has most likely drawn moisture this is not good take it to have the system recovered and a new restrictor valve put in. leak checked and recharged

Ammonia is just what you a re smelling as the coolant is ammonia based Your cooling unit has leaked and is done for- Sorry I had to be the one to tell you

2 choices Replace the refer or Replace the coiling unit, I would suggest replacing the refer and having a new warranty

I need a radio code for a mitsubishi mirage ES 2001