Maybe as long as the water heater is not leaking( which it is probably not) I would suggest a box fan and let it blow as a hair dryer does to evaporate the water. You need forced air more then heat to dry it out
1. is this a sign of a leaking heater core?
in case you have been dropping anti freeze commonly you likely have a heater center this is rotting on the seams and the leak is going to get slowly worse , leaving the carpet moist for an prolonged time will ultimately rot and discolor it i could attempt Bars leak in the plastic bottle in case you prefer to objective to seal the smaller leaks, yet while your cooling device is previous and drained this could plug it up thoroughly. Its probably maximum suitable to drop the dashboard and replace the heater center its approximately 5 to 7 hours based on the twelve months make and sort yet this could do away with some issues you have now and the extra serious ones that are headed your way while the seam blows out and you vehicle is ineffective in the midst of the line
2. Car heater blowing cold air?
There is absolutely no way possible to have to replace the "whole new heater" because it depends on the coolant in the engine to provide heat, with quite a few controls in between the engine heat and the heater core that provides the heat in the passenger compartment. Find a more honest mechanic!
3. Roommate leaves space heater on...?
That's probably why she not at her boyfriend house anymore, she ran the bill up lol. Show her the higher bill, or just tell her that y'all do not even use space heaters because they are not safe and y'all use electric blankets instead. Tell her y'all do not sleep anymore knowing the heater is on. Tell her your husband is arguing with u every day and you do not want your marriage ruined over a unsafe fire hazard heater. Then say please understand this is serious. If she still do not understand then fck dat dum stupid B.
4. no power going to immersion heater?
purchase a circuit finder tester, you can connect the transmitter at the heater and then run the receiver over the wiring in your panel to find the necessary wiring. this is for dead wiring only so insure there is no live wires. All instructions are included and the tool costs under $25 and is extremely useful.
5. Heater in car not working?
Heater core needs repair. Take it to a shop
6. Replacing heater core?
Open the hood and you will see 2 hoses about 1-1/2" in diameter or so. They go up in to the cab of the truck through the passenger side firewall. That is hooked to the heater core, it is behind the glovebox. Pretty easy to do , make sure you drain the antifreeze, or it will get inside the cab.
7. Is this a good tankless water heater?
Your incoming water temperature during the winter will be about 40-45F and a 77 degree rise will give you about 120F hot water temperature at 2.4 GPM. This will probably be enough hot water for one shower unless it is an older shower head that uses more than 2.4 GPM. Based on the cost you have been quoted, i am guessing it is an electric unit, so you might want to check your panel to see if you have available spaces/breakers to power the unit. It will probably take 2-40 amp breakers or in that range. You also probably wo not be able to run other hot water fixtures while you shower since this unit will be max'ed at just one shower. Make a list of your hot water fixtures and calculate the amount of hot water you will need and be comfortable with. You will need to compromise on how many fixtures you use with a unit this small. You can check my sources for more detailed information. Remember, electric units save electricity, but require lots of power.
8. a random heater AC question?
If it's really just an A/C, no, the thermostat will never trip and nothing will ever happen. If it's an automatic switch over heat pump (and your t-stat allows for the hand-off), yeah, the reversing valve would engage, the unit would come to life and the a-coil would course with refrigerant while the main blower relay engaged. What ever made you think that A/C did anything but cool?