Is it safe to pour hot water on frozen doors and windows on your car?

it's safe but why would you want to do that? Although the hot water will melt the ice, but the water will get frozen again anyway.

It's OK, but if the temperature is below freezing, they'll just freeze up again in a few minutes. It's much better to use anti-freeze designed for locks of for windshields. When you have a chance, wipe your door seals with a silicone lubricant and you won't have the problem again. Also squirt some WD-40 down into the window mechanisms. This should work as well.

Hot water on the windows might crack the window? I'd get into the car and warm the car w/defroster on high for awhile. You want to get the water off.

Be careful; it might freeze again and make the problem worse if it is really cold outside. I wouldn't use hot water either; it could cause some damage.

The windows can crack. Plus, the hot water can freeze

No, hot water on a frozen window will crack your glass.

no it will crack the glass

NO! they will crack!!!!!!!

no... it mite crak

no the instant tempature will cause micro fractures at least if not shattering glass and also water expands as it freezes soo if it dosent open up imediatly the water will run down inside the door and freeze and expanding cuasing perment gaping in the seals around the door or window

Thermal shock is the name given to cracking as a result of rapid temperature change. Glass and ceramic objects are particularly vulnerable to this form of failure, due to their low toughness, low thermal conductivity, as well as their high-melting point (which often leads to their use in high-temperature applications.)

Thermal shock occurs when a thermal gradient causes different parts of an object to expand by different amounts. This differential expansion can be understood in terms of stress or of strain, equivalently. At some point, this stress overcomes the strength of the material, causing a crack to form. If nothing stops this crack from propagating through the material, it will cause the object's structure to fail.

Well it can be bad taking in consideration some simple physics i.e as its cold the particles in the glass are close together because they have lost energy and when you suddenly put hot water the particles get this rush of energy and start vibrating and want to move apart and its possible to break the glass....so be on the safe side and use slight warm water or you are going to have a lot more than frosted glass.............

The only danger would be pouring it on yourself.

not burning water but warm i perfect it won't crack unless it is burning....

i hope i helped
good luck
:-D

Door locks, maybe. But windows, NO!. The hot water could cause the glass to break.
A better method for both is the deicers sold in spray cans for about $2.

Warm water works for me.

warm water yes,not to hot though.