Hot & Cold Water connection - can I connect just to cold?

There is a filter screen at the washer inlets for hot and cold water. Clean the screens

First the is a hot and cold water pipe. To those are connected hot and cold water outlet bib valves to which are connected, respectively, hot and cold water hoses going to (or you could say, coming from) their respective connections to the washer. Correct this if I am wrong but, it appears you might be talking about those hose connections to the water spigots but calling them pipes, not hoses. If that is true, you contecture is correct: it is most typically a worn out hose washer or o-ring and replacing that item should correct any dripping. By sure the part is characterized for hot water.

you need a duel pipe get one off the link below there standard for all washers..
http://www.espares.co.uk/product/es968954/washing-machine-dual-y-fi?ApplianceTypeId=1085&ManufacturerId=805&utm_source=google+base&utm_medium=shopping&utm_campaign=google+base&mkwid=saErAFkPq&pcrid=28268691421&kword=&match=&plid=&gclid=COnXq4n6mbwCFSoEwwodvFMAeQ

What is needed is to use proper hose to connect to the respective connections of the cold and hot line pipe in your house.
Identify the connection and buy the required hose that fits to the line

You have clog in the water line.
Since all hot water pipes are involved, clog is probably near water heater.

Buy pressure gauge at hardware store that threads onto hose connection.
Brady BTG 100 at Amazon
Picture of gauge

Check outdoor pressure for baseline pressure in your home.
Turn off electricity to hot water heater for an hour or two so there is not scalding water.
Open drain valve on water heater to see if water heater is clogged with sediment.
http://waterheatertimer.org/Water-heater-will-not-drain.html

Put pressure gauge on drain valve and compare with outside pressure.
Open hot water spigot on bathtub and see if tank pressure drops ... if tank pressure drops significantly with bathtub spigot on, then clog is on incoming cold water before tank, and could be on outgoing hot water pipes too.
If tank pressure stays about the same, then clog is on outgoing hot water pipes.

Clog can be sediment caught in cold water shut off valve located above tank. Open and close valve and test pressure again. Take apart incoming cold water pipes above tank and check for sediment. Replace valve. Look at condition of cold water nipple on top of tank.

Sediment caught at hot water elbow near tank.
Sediment can fill up old pipes. Take apart hot water pipes above water heater and see condition.
Look at condition of hot water nipple on top of tank.
You may have to take apart pipes up to first or second elbow.

Pipes can decay at joint where copper pipe connects to galvanized pipe. Check for copper to galvanized connections on cold or hot pipes and replace section of galvanized pipe. Copper pipe will probably be good, the galvanized pipe will deteriorate. Replace copper-to-galvanized joint with 3/4" non-conducting union from hardware store

Tanks are marked with Hot and Cold.
1) If water connections are on top of tank, look for red marking or word HOT that shows where hot water pipe connects. Look for blue marking or word COLD that shows cold water connection.
2) If water connections are on side of tank, cold water connects to bottom one, and hot connects to top.

3) If hot and cold are reversed, the tank will not work.
Pipes on top of tank: cold water enters tank and is sent to bottom of tank in a long tube called the dip tube. This means the cold is on the bottom since hot water rises to the top. The hot water exits top of tank.
Pipes on side of tank: You want cold water to enter bottom, so hot water naturally rises to the top outlet.

no problem at all using only cold. Most washers only will fill with hot water after that all other cycles use cold.

3 minutes?? does the water run cold then? or just warm?
Is this what the tank you replaced was doing? If so, then you may have: 1 a recirculating pump instant hot water system thats faulty and allowing cold water backflow into hot water piping. 2 A tempering valve that has stuck, allowing cold water into your hot water system.
Or maybe a broken or missing dip tube in your new heater.
If after 3 minutes the water is coming cold out leave that faucet running and go to heater and feel the hot water outlet pipe from the heater. if that pipe is hot then the heater is not the problem. If the hot pipe from the heater is cold the heater is the problem. (Make sure the cold pipe coming into the heater is connected to the Right side marked "cold" !) If there is a tempering valve by the heater: feel the output from the tempering valve, if it is cold and the pipe from the heater to the tempering valve is hot, then the tempering valve is the problem. If all these are OK somewhere in your plumbing system hot and cold may be connected possibly a faucet or showerhead that is shut off at the spout/head, but hot/cold handles are left turned on then cold water can backflow thru hot pipe.

If there is only 1 water connection on the back of the machine then it's a cold water supply only and the machine will be fitted with a heater element to heat the water. If it has 2 water connections then you need the hot supply and should ask someone to fit the correct isolation valve on the capped pipe so you can fit the required hose. Most modern machines are cold water only.

hi is this hot and cold water piped machine? ie two connections on rear of machine for hot and cold pipes ? if so are your pipes connected properly on machine and the water supplies? if cold supply is connected to hot supply then wash inlet allows water in washer then washes in cold? but when rinse is due? the elec valve that has hot water pipe connected?? is failing to open allowing water flow of hot on rinse so advise recheck pipes for flow of water from both? when disconnected from machine if flow ok then possible valve blocked/faulty hope you can understand above? if you can give more info on your machine it would help to offer a remedy?