Salus rt500rf not firing up

There are a few possible causes for your Peerless Gas Boiler not firing up on its own:

1. Faulty thermostat: Check if the thermostat is functioning properly. Make sure it's set to the correct temperature and that it's calling for heat when the temperature falls below the set point.
2. Pilot light issue: If the pilot light is not lit or keeps going out, the boiler won't fire up. Check the pilot light and ensure that it's lit and steady. If it's not, you may need to relight it or have a professional come to do it.
3. Dirty burners: If the burners are dirty or clogged, the boiler may have trouble firing up. Clean the burners and ensure that they're free of debris or buildup.
4. Faulty ignition system: If the ignition system is malfunctioning, the boiler won't fire up. Check the ignition system, and if it's faulty, have it repaired or replaced by a professional.
5. Electrical issue: If there's an issue with the electrical wiring or control board, the boiler may not fire up. Check the wiring and control board for any visible damage or issues. If you can't identify the problem, have a professional check it.

It's important to note that gas boilers can be dangerous if not handled properly, so if you're not familiar with the system, it's best to have a professional take a look.

Many times the factory wiring on the boiler is set up to maintain boiler temperature with a built-in aqua-stat. The thermostat then controls the circulator pump to transfer heat from that loop to the structure. So, if this is the case, your programmable stat may just be controlling the circulator. There are many, many control AND piping configurations to boilers. Some very different than others.

Wiring is wrong.

firstly its always better to change both of the bands even if one is broken this always keeps the drive trim.all seems well clean all the contacts ie battery and gun (do not use any cleaning products this will cause grease)just wipe clean with paper towel.

did you bleed the pump as well

Let's see what we can do to trouble-shoot this boiler--

First of all-- Are we talking about a Hot Water 'Boiler'-- In other words does this boiler heat water that circulates thru the house, to keep you warm?

Next-- What is your fuel?

Have you Shut the system down, to reset it?-- What happens when it comes back on again?-- Clicking sounds-- pumps trying to start-- solenoids trying to open, etc.-- Tell us what you observe-- so we can help you trouble shoot this problem.

Mack B

Here you go, this is pretty much identical to the Altech unit you're describing (Salus RT500RF Manual (SALR503) 531ESALR50310A95), I have the Altech ALTHC014 too, I have checked them against each other. Hope this helps, this is probably why you can't find the Altech manual, as the Salus one is the same and they haven't bothered rebranding this manual to Altech.

Do you have an inducer on this unit? If you do, it could be the pressure switch not opening or closing properly. Also, check for any limit switches that might have tripped that you need to reset. Some limits are automatic reset and some are manual. Also, check for a reset switch on the unit that is used when the power gets cut un expectantly. You can do a little research on the unit also using the model number and brand of unit on-line to find a user manual that might have some trouble shooting guidelines.

the stat works using a bi metalic strip so that click you here is making a contact and telling the boiler to call for heating so if you getting no click you need a new room stat. Replace with same model and note the wiring most stats only use 2/3 wires depending on system

Prior to writing the above fault I had asked the owner to turn the boiler temp controller , for the heating side, down just a fraction . I was phoned this morning to tell me that the boiler had stayed on allnight with no fault light . After consulting with the plumber who fitted the system it appears that there might not be a room stat ,